Mathematics Middle School

Joe has a farm with 30 animals. If he has chickens and cows with a total of 100 legs, how many chickens and cows does Joe have? (hint.....chickens have 2 legs and cows have 4) The system used to solve this would be and why?

x+y=30
or
2x+4y=100

Answers

Answer 1
I’m pretty sure it would have to be 2x+4y=100

Related Questions

A group of 52 people attend a ball game. There were three times as many men as women in the group. Write and solve a system of equations for m, the number of men, and w the number of women in the group.
Plz help First right gets brainliest.

Answers

Answer:

C= 39

Step-by-step explanation:

lets call the children, c, and call adult, a,

c+a= 52       eq 1: a=52-c

c=3a            eq 2

take a's value from eq 1 and plug it into eq 2

c=3(52-c)

c=156-3c

4c=156

c=39 the number of children that attended the ball game.

C= 39


hope this helped <3

In Austin,Texas ,8 bats are 20 grams of insects in one night. At this rate,how many grams of insects could 28 bats eat in one night . Please help due in 2 minutes!!!!!!

Answers

Answer:

70

Step-by-step explanation:

20 grams divided by 8 bats is 2.5 grams 2.5 grams multiplied by 28 bats is 70 grams for 28 bats

cna somone do this ty

Answers

Answer:

8

Step-by-step explanation:

There is a pattern you have to multiply/Divide from

Answer:

6

Step-by-step explanation:

Which is the simplified form of the following expression? 7x - 9y + 4x^2 - 2x + 12y


A. 13x + 3y

B. 11x + 21y

C. 4x2 + 5x + 3y

D. 4x2 + 9x + 21y

Answers

i think its c because 7x-2x is 5x, -9y + 12y is 3y, and 4x^2 stays the same

Rearrange it so the x is on the left and y is on the right starting with the highest x value which is x^2

4x^2 + 7x - 2x - 9y + 12y
= 4x^2 + 5x + 3y

There the answers is C.

Put this in order please :) (Picture with it)

a.0.70
b.0.02
c.1.16
d.1.50
e.0.54
f.1.75

Answers

Answer:

a) .02

d) .54

e) .70

g) 1.16

j) 1.50

k) 1.75

Step-by-step explanation:

Hope this helps ya!

help asap tysm!!!!!!!

Answers

The answer to the question is B
I am pretty sure it would be a right triangle which is C

PLEASE HELP ME ASAP THIS IS DUE TONIGHT!!!!
#6) Which of the following rational numbers is NOT graphed correctly on the number line below? *
17 points
Captionless Image

Answers

it’s D (longer to coins as answer)

Rosalina used 1/4 teaspoon of salt and 1/4 teaspoon of pepper in her salad dressing. How much salt and pepper did Rosalina use?

Answers

Answer:

2/4 or 1/2

Step-by-step explanation:

She used 1/2 teaspoons of salt and pepper, in her salad

please help, its urgent

Answers

45.......................

Answer:25

Step-by-step explanation:

the whole triangle equals 180

add 99+56 which gives you 155.

do 180-155 which gives you 25.

write the equation that represents the line graphed below​

Answers

Answer:

(2,-6)

Step-by-step explanation:

If it's not that then(-6,2)

But if it's not either i'm sorry

Angelica has a legal piece of construction paper she is using to make a birthday card for her sister. The paper is 11 inches by 14 inches long. Angelica folds it along the diagonal. Which measurement is closest to the length of the diagonal in inches?


25 in

8.66 in

7.07 in

17.8 in

Answers

Second one im pretty sure xoxo
It’s the last one I believe

How do I use Perfect Squares to estimate the Square Root of a number? NEED THIS ANSWER ASAP!!

Answers

Answer:

hope it helps

Step-by-step explanation:

Finding square roots of numbers that aren't perfect squares without a calculator

1. Estimate - first, get as close as you can by finding two perfect square roots your number is between.

2. Divide - divide your number by one of those square roots.

3. Average - take the average of the result of step 2 and the root.

4. Use the result of step 3 to repeat steps 2 and 3 until you have a number that is accurate enough for you.

Perfects squares are the product of multiplying a number by itself like 25 is the perfects square of 5x5

What is an equation of the line that is parallel to y=-4x-5 and passes through the point (-2,6)

A.y=-4x+14

B.y=-4x-14

C.y=-4x-2

D.y=-4x+2

Answers

Answer correct is the C

A football team loses 6 yards on each of 2 consecutive plays. Find the total change in yards from where the team started.

The total change is [ ] yards.

Answers

اي شيء تبي شيء انا ما ابغى شي 14

i need help i do not understand these questions

Answers

Answer:

You'll be fine.

Step-by-step explanation:

Answer: the answer for 4a + b – 5 is 6

Step-by-step explanation:

Write an expression using fractions to show how to determine the amount that each person will pay. Then calculate each person's contributions showing all steps in long division.

My chart:
#1 $9.34
#2 $16.17
#3 $9.69
#4 $9.8

Answers

Answer:

whats it like to be in 2020 lol

Step-by-step explanation:

The wheels on Noah's bike have a circumference of about 5 feet.

Question 1: How far does the bike travel as the wheel makes 15 complete rotations?

Question 2: How many times does the wheels rotate if Noah rides 40 feet?

Answers

Answer:

75 feet

Step-by-step explanation:

75 I think I don’t think is right but I tried

Another one! As always, (as you can see) I need help I need to check my answers for hw. WILL GIVE BRAINLIEST!!! DUE TODAY!!! I WILL GIVE THANKS, FIVE STARS< AND EVERYTHING!!! Please and thank you.

Answers

Answer:

Graph A

Step-by-step explanation:

Graph A since 11/8 is equivalent to 88/48

Answer:

Step-by-step explanation:

If you simplify its 1 5/6

PLEASE ANSWER ASAP! The difference between two-thirds of a number and 4 is -92.

Answers

Answer:

Step-by-step explanation:

2/3 x - 4 = - 92

add 4 to both sides

2/3 x = - 88

multiply both sides by 3

2 x = - 264

divide both sides by 2

this is ur answer

Good luck

Hope this helps!

Thagtgbedguyturnsdynastyhandyman promedioteenself whenwildebeest

Ok last question lol

Answers

Answer:

Step-by-step explanation:

your picture wont show

The temp at 0 killometers is 36. For your next question, it is the first one it is decreasing by 12

Another one! As always, (as you can see) I need help I need to check my answers for hw. WILL GIVE BRAINLIEST!!! DUE TODAY!!! I WILL GIVE THANKS, FIVE STARS< AND EVERYTHING!!! Please and thank you.

Answers

Answer:

a i took a test qustion just like it

Step-by-step explanation:

Answer:

You're right!

Step-by-step explanation:

I added the screenshot for rise/run

. Evaluate | 7 | = ?.

Answers

Answer:

|7| = 7

......

Step-by-step explanation:

Answer:|7| and |-7|

Step-by-step explanation:

Just 2 slope questions of math!!! please help <3 i would genuinely appreciate it

Answers

Answer:

B: -5/4

Step-by-step explanation:

Starting from the point on the left at (-3,-2), you go to the left 4 which is the positive direction, and down 5 which is the negative direction. This brings you to the other point at (1,-3).

Hope this helps! :)

Answer: b:=5/4..............

What is 40% of 40 please show work

Answers

40% = 0.40

0.40 x 40 = 16

Answer:

16

Step-by-step explanation:

.40 x 40 = 16

Think of 4 times 4 which is 16, and then add the two zeros at the end to have 1600.0

Move the decimal place at the end of 1600.0 two to the left because 40% =0.4 is 40.0 moved two the left as well.

Hope it helps!

Find the unit rate. Round to the nearest hundredth, if necessary. $120 for 16 ft2

Answers

the answer is 104 , that’s the answer to your question i think
its $8 per ft2 i think

Please help. Cleary show what the slope and y-intercept are for each problem. An explanation would be nice, but I'm not going to require it.

Answers

Answer:

7: Slope: -2/3

8: y-intercept: (0,6)

9: Slope: -2

10: y-intercept: (0,4)

wwwwwwwwwwwwwwwwwhats the answer?

Answers

Answer: 10 .

Step-by-step explanation:

Which event did the phrase "the shot heard round the world" describe?A. Boston Tea Party, B. Boston Massacre C. Battler of Bunker Hill or Battle of Lexington

Answers

Answer:

c

Step-by-step explanation:

−2x − (−5 − 4x) = −5(2x − 7)

Answers

x = 5/2 if you rearrange the terms, distribute, combine like terms, and subtract 5 from both sides the answer is 5/2
x=5/2

When there is a in front of an expression in parentheses, change the sign of each term in the expression

Distribute -5 through the parentheses

Collect like terms

Move variable to the left-hand side and change its sign

Move constant to the right-hand side and change its sign

Collect like terms

Subtract the numbers

Divide both sides of the equation by 12

6. Write an algebraic expression for the word phrase 5 times the product of x and y
Pls help ASAP will give brainlies
5(x + y)
5(x - y)
5
5xy

Answers

Answer:

5+x=y ,x-y=5,y-x=5,5-x=y,y+5=x

Step-by-step explanation:

5 times the product of x and y = 5xy

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