the last 2 are so difficult help?

Answer:

a₈ = 44

Step-by-step explanation:

to find a₈, substitute n = 8 into the explicit formula

a₈ = 6(8) - 4 = 48 - 4 = 44

Answer:

5

Step-by-step explanation:

To find out how many golf balls Rafael used at the driving range, we can use the following formula:

number of balls used at the driving range = total number of balls x percentage used

Given:

Total number of balls = 25

Percentage used = 20%

So we can substitute these values into the formula:

number of balls used at the driving range = 25 x 20% = 25 x 0.20 = 5

Therefore, Rafael used 5 golf balls at the driving range.

Answer:

I believe you answer would b B!

The number of gallons of gas used every 1 mile traveled.

Step-by-step explanation:

Hope it helps! =D

The estimated mean score is given as follows:

19.12.

The mean of a data-set is obtained as the sum of all observations in the data-set divided by the number of observations.

For each score, we consider it to be the mean of each interval in the frequency table, hence the sum of all scores is given as follows:

4 x 19 + 9 x 14 + 13 x 15 + 18 x 28 + 28 x 10 + 43 x 13 = 1740.

The total number of scores is of:

19 + 14 + 15 + 20 + 10 + 13 = 91.

Hence the mean score is obtained as follows:

1740/91 = 19.12.

The frequency distribution for this problem is given as follows:

1-7:19

8-10:14

11-15:15

16-20:20

21-35:10

36-50:13

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By using the equation of the line of best fit, the​ number of minutes Nikki would need to listen to the radio is equal to 63.275 minutes.

In order to determine the​ number of minutes Nikki would need to listen to the radio, we would have to substitute the value representing the number of commercials (y) into the linear equation and then evaluate as follows;

y = 0.338x − 1.387

When the value of y = 20 commercials, the number of minutes (x) in feet is given by;

20 = 0.338x − 1.387

By rearranging and collecting like terms, we have the following:

0.338x = 20 + 1.387

0.338x = 21.387

Number of minutes (x) = 21.387/0.338

Number of minutes (x) = 63.275 minutes.

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Complete Question:

Nikki gathered data about the length of time she spent listening to the radio and the number of commercials she heard. She organized the data in a scatter plot, where x represents the minutes spent listening and y represents the number of commercials. Then she used the graphing tool to find the equation of the line of best fit: y = 0.338x − 1.387. Based on the line of best fit, for approximately how many minutes will Nikki need to listen to the radio to hear 20 commercials?

The system of linear equations is y = 800x + 5445, and y = 900x + 4995. The solution is 4.50. This states that the number of steps taken by Danna and Lucia will be equal after 4.50 hours.

The set of two or more linear equations containing the same variables is known as a system of linear equations in mathematics. In this case, linear equations are first-order equations, where the maximum power of the variable is 1. One, two, or three variables may be present in a linear equation.

Let us suppose the number of hours = x.

Let us suppose the total number of steps = y.

Given that, Lucia has 5445 steps and Lucia averages 800 steps per hour.

For Lucia the linear equation is:

y = 800x + 5445

For Danna, Danna has 4995 steps and Danna averages 900 steps per hour.

For Danna the linear equation is:

y = 900x + 4995

The system of linear equations is:

y = 800x + 5445 (equation 1)

y = 900x + 4995 (equation 2)

Substitute the value of y of equation 1 in equation 2:

800x + 5445 = 900x + 4995

5445 - 4995 = 900x - 800x

450 = 100x

x= 4.50

B. The solution of the linear equation is 4.50. This states that the number of steps taken by Danna and Lucia will be equal after 4.50 hours.

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By calculating , The value of x is 5√5.

What is triangle?

Triangle can be defined in which it consists of three sides , three angles and the sum of three angles is always 180 degrees.

From the given figure,

When we draw a line inside the figure than it becomes into rectangle and one another triangle.

so,

In the right angled triangle,

with base 10 and opposite side 5

We have to find the hypothenuse that is x .

so,

from pythagorean theorem

we can say that

Sum of squares of two sides is equal to square of hypothenuse

so,

10*10 + 5*5 = x*x

100+25 = x*x

x*x = 125

x = 5√5 .

Hence, The value of x is 5√5

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Answer: I'm sorry, but the information provided is not enough to determine the value of x. The statement "mA = 3x°" does not provide enough context to understand what "mA" and "x" represent, and what the relationship between them is. Additionally, the statement "m" does not provide any information that can help determine the value of x. Can you please provide more information or context?

Step-by-step explanation:

The new value = 340 + (19% × 340)

The actual change = The new value - 340

"Information available from the question"

340 increased by 19%

To write in mathematically:

The value of the percentage increase = 19% × 340

The new value = 340 + The value of the percentage increase

The new value = 340 + The value of the percentage increase

= 340 + (19% × 340)

= 340 + 19% × 340

= (1 + 19%) × 340

= (100% + 19%) × 340

= 119% × 340

= 119 ÷ 100 × 340

= 119 × 340 ÷ 100

= 40,460 ÷ 100

= 404.6

The actual change = The new value - 340

                              = 404.6 - 340

                              =  64.6

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The probability of all 5 marbles being red is (8/26) x (7/25) x (6/24) x (5/23) x (4/22) = 0.000766.

This can also be written as P(RRRRR) = 8/26 x 7/25 x 6/24 x 5/23 x 4/22. This probability is very small, as the chances of randomly selecting only red marbles from the bag is low.

This calculation is based on the formula for combinations, which states that the probability of selecting r items from a group of n items is nCr x Pr, where nCr is the number of combinations of selecting r items from n items and Pr is the probability of selecting a specific item. In this case, n = 26 and r = 5, so the number of combinations of selecting 5 items from 26 items is 26C5. This is equal to 8x7x6x5x4/5x4x3x2x1, or 8x7x6x5x4/120. The probability of selecting a specific item is 1/26, as there are 26 items in the bag. Therefore, P(RRRRR) = 8/26 x 7/25 x 6/24 x 5/23 x 4/22.

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Answer:

The ratio of sugar to lemon juice is 2 cups sugar : 3 cups lemon juice.

The ratio of lemon juice to water is 3 cups lemon juice : 8 cups water.

The first statement is true because the recipe calls for 2 cups of sugar and 3 cups of lemon juice. The ratio of sugar to lemon juice is therefore 2:3, or 2 cups sugar : 3 cups lemon juice.

The second statement is true because the recipe calls for 3 cups of lemon juice and 8 cups of water. The ratio of lemon juice to water is therefore 3:8, or 3 cups lemon juice : 8 cups water.

It's important to note that these ratios are in the context of this specific recipe, and may differ from other lemonade recipes.

Step-by-step explanation:

The expression representing the total amount paid by Joshua at the register is 1.007x dollars.

We have,

To represent the total amount that Joshua paid at the register, we need to account for the following steps:

- Applying the 5% discount to the original price x:

Discount = 5% of x = 0.05x

Calculating the price after the discount:

Price after discount = x - Discount = x - 0.05x = 0.95 x

Adding the 6% tax to the discounted price:

Tax = 6% of the discounted price = 0.06 x (0.95x)

The expression for the total amount that Joshua paid at the register:

Total amount paid

= Price after discount + Tax

= 0.95 x + 0.06 (0.95 * x)

Simplifying the expression:

Total amount paid = 0.95x + 0.057x

Total amount paid = 1.007x

Thus,

The expression representing the total amount paid by Joshua at the register is 1.007x dollars.

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The range would be; [75,212] and the greatest one is around 212.5. .5] a domain and a range.

The domain of a function is defined as the set of all the possible input values that are valid for the given function.

The range of a function is defined as the set of all the possible output values that are valid for the given function.

Recall this by saying "DoLaR RiBiT," where "DoLaR" stands for "domain," "L" and "R" stand for "left to right," "R" stands for "range," and "B" and "T" stand for "bottom to top," and "R" stands for "range."

Since we can see that the function doesn't approach 250,  in the graph, 250 is not inside the range.

Between the minimum and greatest value are the numbers that make up the range. The range would be; [75,212] because the lowest Y value is 75 and the greatest one is around 212.5. .5] a domain and a range.

The collection of values that can be substitute into a function's domain are called its parameters.

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Answer:

9.87 Gallons

Step-by-step explanation:

Start by finding how far mr. keith here can drive with one gallon of gas.

to do this you will:

360 ÷ 12 = 30

For one gallon of gas, he can drive 30 miles.

Now that we know the rate for 1 gallon of gas, you just apply that rate to the new mileage:

296 (new distance) ÷ 30 (how many he can do in one mile) = 9.87 (how many times that 30 miles goes into 296 (recall that this is the rate))

To drive 296 miles, keith will use 9.87 gallons of gasoline.

hope this helped :)

If you invest $10000 in a bank , then the better investment plan is (a) 9% compounded monthly .

The amount to be invested in bank is = $10000  ;

the formula to calculate the final amount by compounding is given as :

A = P(1 + r/n)^(nt)   ;

Where: (A) = final amount , (P) = initial amount ,

⇒ r is interest rate (in decimal form) , n is number of times the interest is compounded per year and

⇒ t is number of years investment is made

(a) the rate of interest is 9% compounded monthly ;

in this case n = 12  , because there are 12 months in 1 year ;

So , Amount = 10000(1 + 0.09/12)^(12×t)

Amount = 10000 × (1.0075)^(12×t)  

Suppose t = 1 ;

we get , Amount = 10000 × (1.0075)¹² ≈  10938 .

(b) the rate of interest is 9% compounded annually ;

in this case n = 1  , because compounded annually ;

So , Amount = 10000 × (1 + 0.09)^(1×t)

Amount = 10000 × (1.09)^t  

Suppose t = 1 ; we get , Amount = 10000 × (1.09)¹ ≈ 10900 ;

On comparing both the interest value we observe that ,

the monthly compounding returns more value than compounding annually  .

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The mean  is 24 and standard deviation is 10 of the sampling distribution.

The term in math called standard deviation is defined as the standard deviation of the sampling distribution is also known as the standard error and it is inversely proportional to the sample size in which is as the sample size increases the standard deviation of the sample means decreases.

Here we know that the value of n is 100 and the number of samples 240.

Agreed count = 38.

Here we have to assuming the expected population standard deviation to be 10, and a population size of 100, the study would require a sample size of 24 to estimate a mean with 53% confidence and a precision of 1.5.

Then the standard deviation is 10.

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The linear function that describes the relationship is y = -2x + 3

From the question, we have the following parameters that can be used in our computation:

x f(x)

−1 5

0 3

1 1

A linear function is represented as

y = mx + c

Where

c = y when x = 0

This means thar

c = 3

So, we have

y = mx + 3

From the table, we can see that

As x increases by 1, y decrease by 2

This means that

m = -2

So, we have

y = -2x + 3

Hence, the equation is y = -2x + 3

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Jill ride 43.39 meters farther than Jessica.

In a right-angled triangle, the square of the hypotenuse side is equal to the sum of the squares of the other two sides, according to Pythagoras's Theorem. The theorem can be used to determine how steep mountains or slopes are. To calculate the distance between an observer and a location on the ground when the observer is looking down from a tower or structure. It is mostly utilized in the construction industry.

Given, Jill and Jessica are bike riding at the park. Jill rides her bike around the two edges of the rectangular park while Jessica takes the shortcut

Given the length of the Rectangular park = 100m

The width of the park =  60m

Thus jill ride total = 60 + 100

Jill ride total = 160m

Jessica took a shortcut since she rides diagonally.

From the Pythagorean theorem:

hypotaneus² = base² + height²

Thus,

total distance Jessica covers = √(60² + 100²)

total distance Jessica covers = √3600 + 10000

total distance Jessica covers = √13600

total distance Jessica covers = 116.61

Difference between their distances = 160 - 116.61

Difference between their distances = 43.39

therefore, 43.39 m farther does Jill ride than Jessica.

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Complete question:

The height of the tower is equal to the length of the side opposite the angle of elevation plus the length of the side opposite the angle of depression.

The angle of elevation and angle of depression in this problem can be used to solve for the height of the tower.

Since the angle of elevation is the angle from the window to the top of the tower and the angle of depression is the angle from the window to the bottom of the tower, the height of the tower can be determined by finding the length of the side opposite the angle of elevation and adding it to the length of the side opposite the angle of depression.

Using trigonometry, we can solve for the two lengths using the sine and cosine functions. The sine of the angle of elevation is equal to the length of the side opposite the angle divided by the hypotenuse. The hypotenuse is the distance from the window to the tower, which is known to be 275 feet. Therefore, we can solve for the side opposite the angle of elevation by multiplying the sine of the angle of elevation by 275. The cosine of the angle of depression is equal to the length of the side opposite the angle divided by the hypotenuse. We can solve for the side opposite the angle of depression in the same way.

Once the two lengths are calculated, we can add them together to find the height of the tower.The height of the tower is equal to the length of the side opposite the angle of elevation plus the length of the side opposite the angle of depression.

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By factoring the preceding quadratic equation and then inserting the values of "x," which are -3, -2, -1, 0, 1, 2, 3, 4, 5, the values of "y," which are 12, 5, 0, -3, -4, 3, 0, 5, 12, may be found.

First, factorize the given quadratic equation before completing the table.

Now, the values of "x" according to the given table are:

x = -3, -2, -1, 0, 1, 2, 3, 4, 5

Add the expression x=-3 to the equation (1).

y = (-3-3)(-3+1)

y = 12

Add the expression x=-2 to the equation (1).

y = (-2-3)(-2+1)

y = 5

Put x=-1 as a value in the equation (1).

y = (-1-3)(-1+1)

y = 0

Put x=0 as the value in the equation (1).

y = (0-3)(0+1)

y = -3

Put x=1 as the value in the equation (1).

y = (1-3)(1+1)

y = -4

Put x=2 as a value in the equation (1).

y = (2-3)(2+1)

y = -3

Add the expression x=3 to the equation (1).

y = (3-3)(3+1)

y = 0

Add the expression x=4 to the equation (1).

y = (4-3)(4+1)

y = 5

Add the expression x=5 to the equation (1).

y = (5-3)(5+1) y = 12

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If f(0) = 18 and f(1) = 13 then f(0) be the largest value.

A function is a relationship between a number of inputs where each input has exactly one output, according to one definition.

A function in mathematics from a set X to a set Y allocates exactly one element of Y to each element of X. The sets X and Y are collectively referred to as the function's domain and codomain, respectively. Initially, functions denoted the idealized relationship between two changing quantities.

A mathematical phrase, rule, or law that establishes the link between an independent variable and a dependent variable (the dependent variable). If f exists typically utilized to denote a function (x).

Let the function f(x) = 18 - 5x

a) f(-4) = 18 - 5(-4) = 38

b) f(0) = 18 - 5(0) = 18

f(1) = 18 - 5(1) = 13

Therefore, f(0) be the largest value.

The complete question is:

Given the function f(x) = 18 - 5x

a. What is the value of function f given an input of -4 ?

b. Which is larger, f(0) or f(1)? Show your work to justify your answer.

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The vector equation for the line of intersection of the planes x+4y-4z=-3 and x + z = 5 is r = <5, -2, 0> + t <-1, 5/4, 1>

The equations of the planes are:

x + 4y - 4z = -3                    ..............(1)

and x + z = 5                      .............(2)

Subtract equation (2) from equation (1),

( x + 4y - 4z + 3) - (x + z - 5 ) = 0

4y - 5z + 8 = 0

we can rewrite is as,

4y = 5z - 8

y = 5/4 z - 8/4

y = 5/4 z - 2                  ...............(3)

Here, we don't have enough equations to uniquely solve for either y or z. So, we set z = t, where t can be any real number.

The variable t is the free parameter for the parametrization of the line.

Substitute z = t in equation (3) we get,

y = 5/4 t - 2        

From equation (2),

x = 5 - z

For z = t,

x = 5 - t

Thus, the parametrization of the line would be,

(x, y, z) = (5 - t, -2 + 5/4 t , t)

           = <5, -2, 0> + t<-1, 5/4, 1>

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If Lysosomes break open during the process of digestion, releasing enzymes into the cytoplasm. The statement that may explain why the entire cell may not be digested is: 3. The pH of the cytoplasm causes the enzymes to function less effectively.

Lysosomes can be defined as vesicles that is made up of enzyme. This Lysosomes  enables the process of digestion to take place and the enzyme found in lysosomes also  help to break down biological molecule.

The reason why the whole cell may not be digested  in an situation where enzymes  are released into the cytoplasm  is that the pH of the cytoplasm  led to the enzymes  not to function effectively.   Optimum PH is required for cytoplasm  to function more effectively.

Therefore the correct option is B.

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The degree measure of the sector is θ = 180°

We know that the area of a sector is nothing but the area inside the section of the circle created by two radii and an arc.

The formula for the area of a sector of the circle is:

area of a sector = [tex]\frac{\theta}{360} \times \pi \times r^2[/tex]

where θ is the central angle measure in degrees

And πr² is the area of the circle

Here, the area of a sector of the circle A = 32π cm²

and the area of a circle (πr²) =  64π cm²

Using above formula of the area of a sector of the circle,

[tex]A=\frac{\theta}{360} \times \pi \times r^2\\\\32\pi=\frac{\theta}{360} \times \pi \times r^2\\\\32\pi=\frac{\theta}{360} \times 64\times \pi\\\\\theta=\frac{360}{2}\\\\ \theta=180^{\circ}[/tex]

Therefore, the central angle associated to that sector is 180°

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On average, a player can expect to lose $0.50 for every ticket they play in the Daily 3 lottery. Therefore, the Daily 3 lottery game is not a good investment, as the expected value is negative, and players are likely to lose money in the long run.

To find the expected value of the Daily 3 lottery game, we need to calculate the probability of winning and the expected payout for winning.

The probability of winning the Daily 3 game with a single ticket is 1/1000, since there are 1000 possible 3-digit number combinations and only one of them is the winning combination.

The expected payout for winning is $500, since this is the prize for matching the winning digits in the correct order.

To calculate the expected value, we can use the formula:

Expected Value = (Probability of Winning) x (Payout for Winning) - (Cost of Playing)

Plugging in the values we found, we get:

Expected Value = (1/1000) x ($500) - ($1)

= $0.50 - $1

= -$0.50

This means that, on average, a player can expect to lose $0.50 for every ticket they play in the Daily 3 lottery. Therefore, the Daily 3 lottery game is not a good investment, as the expected value is negative, and players are likely to lose money in the long run.

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Answer:

3

Step-by-step explanation:

15 is divisible by 3, 3 × 5 = 15. Then of course 1 and 15 no other ones. 1,3,5,15

39 is divisible by 3, 3× 13 = 39, then 1 and 39. 1,3,13,39

The only common factors are 1 and 3, and since 3 is greater that is the greatest common factor.

Hope that helps! Let me know if you have any further questions.

The greatest common factor shared by numbers 39 and 15 is 3.

Given two numbers, 39 and 15.

The greatest common factor can be defined as the factor which is common to both 39 and 15 and is the greatest of all those common factors of 39 and 15.

First, list out the factors of 39 and 15.

Factors of 39 = 1, 3, 13, 39

Factors of 15 = 1, 3, 5, 15

The only factor which is common to both 39 and 15 is 3.

So, the greatest common factor of both is 3.

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The percent of Carmela's gross pay that is her take-home pay is 75%

Carmela's gross pay is $784.25

Her total deductions is $191.17

Therefore the percent of her gross pay can be calculated as follows

The first step is to subtract the deductions from the gross pay

784.25 - 191.17

= 593.08

The percent of the gross pay that is take-home pay is

593.08/784.24 × 100

= 0.75 × 100

= 75%

Hence 75% of her gross pay is take-home pay

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The length of side AB rounded to two decimal places is 16.25.

In a right angle triangle, the side on the base of the angle in question is divided by the hypotenuse. In this case, we can use the cosine ratio to find the length of AB.

We are provided with the following information,

C is the right angle, C= 90°

A= 52°

AC = 10. 01

sin 52° = 0. 788

cos 52° = 0. 616

tan 52° = 1. 280

Now,

since angle C is the right angle, AB is the hypotenuse.

Therefore, with respect to Angle A, AC will be the base and BC will be the perpendicular.

We know, cos x= base/hypotenuse

In this case, cos A = AC / AB

cos 52° = 10. 01/ AB

AB = 10. 01 / 0. 616

AB = 16.25

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√5 is the minimum distance between the line AB and CD.

A pair of numbers called coordinates are used to locate a point or a form in a two-dimensional plane. The x-coordinate and the y-coordinate are two numbers that define a point's location on a 2D plane.

Given Two lines AB and CD,

Since, The minimum distance between two lines is the distance between B and C As we can see in the graph

Since, coordinates of B and C are, (1, 2) and (3, 1)

From the formula of distance between two coordinates:

Distance = √((x₂ -x₁)² + (y₂ -y₁)²)

in our case,

Distance = √((3 - 1)²  + (1-2)²)

Distance = √4 + 1)

Distance = √5

Therefore, the minimum distance between the line AB and CD is √5.

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When the line passes through two points as shown, the slope is 11/3.

The slope or gradient of a line in mathematics is a number that describes both the direction and the steepness of the line. The slope of a line indicates its steepness. Slope is calculated mathematically as "rise over run" (change in y divided by change in x). The slope is a numerical value that describes the steepness of a line and is typically calculated by dividing the vertical distance by the horizontal distance (rise over run) between two points.

Here,

m=3

m=(y2-y1)/(x2-x1)

3=(y+5)/(-3+(2))

-3=y+5

y=-8

The value of slope is 11/3 when the line is passing through 2 points as given.

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