Answer:



Step-by-step explanation:
1. Given, u = 20 , x = 4 , y = 7 , z = 10

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2. 
Multiplying or dividing a positive integer by any negative integer gives a negative integer
= - 8
3. 
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Hope I helped!
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Answer:
w to the power of two, or w squared
Step-by-step explanation:
Yes, one way you can express w^2 verbally, is by saying w to the power of two. However, you can also express this by saying w squared.
Answer:
Edger needs 15 cookies and 5 brownies.
Step-By-Step:
6 + 6 + 3 = 15
2 + 2 + 1 = 5
4 can go into 10, 2.5 times

Let
, so that differentiating both sides wrt
gives

If
and
, the above reduces to

This is the slope of the tangent line, which has equation

8/10 of the students in the art class are painting.
1/2=5/10
5/10+3/10=8/10