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nadezda [96]
3 years ago
14

It takes 60 minutes for 7 people to paint 5 walls. How many minutes does it take for 10 people to paint 10 walls?

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
3 0
It should take 35 min to do the wall!
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Can someone help me with 8 or 9
kumpel [21]
8
A. Delivery is $20. One cord is $120.
B. 1 1/2 cord costs $200. ($180 for the cord and $20 for the delivery)

(I can’t see the full problem for 9)
4 0
3 years ago
How do I do this?? Help!
Shkiper50 [21]

Hi there!

In order to use the elimination method, you have to create one variable that has the same coefficient. This is to be able to eliminate one variable and have a one variable equation (which you can then solve).

In your case, we'll have the "x" have the same coefficient by multiplying the top equation by 4 and the bottom equation by 2 :

4( -2x + 3y = -4) → -8x + 12y = -16

2( 4x - 2y = 16) → 8x - 4y = 32


Now that both of your equation have a variable with the same coefficient, you need to choose rather you need to add or subtract the equations in order to get rid of the variable (in this case we want to get rid of the "x").

In your case, you want to add both equation together which will give you :

8y = 16


Now that you only have one variable, all you need to do now is solve the equation for "y" :

8y = 16

Divide each side of the equation by 8

y = 2 → Your answer


There you go! I really hope this helped, if there's anything just let me know! :)


7 0
3 years ago
Read 2 more answers
Evaluate 2x - y + 4z, if x = 1, y = 2 and z = -1
lidiya [134]

2 x 1 - 2 + 4 x -1 =

the answer is -4.

5 0
3 years ago
help pls! will give brainliest to whoever answers correctly and explains their answer. (PLS DONT ANSWER IF YOU DONT KNOW)
Aleks [24]

Answer:

the answer is C.  how you got 24

Step-by-step explanation:

so find the square of 2 first and that would give -8

-8*4 is -32

8 0
3 years ago
Read 2 more answers
7 over 6 divided by 4
dmitriy555 [2]

Answer:

0.29

Step-by-step explanation:

I used a calculator

8 0
2 years ago
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