Answer:
7y - 28
Step-by-step explanation:
if you multply 7 with inside parenthesis you will get 7y - 28.
It would be 90%..... 45/450= 10%.... so there would be 90% not being used.
Answer:
see the explanation
Step-by-step explanation:
Let
x ----> number of tennis balls
y ----> number of tennis rackets
we know that
To find out the ratio of tennis balls to tennis rackets, divide the number of tennis ball by the number of tennis rackets
In this problem we have

so

That means
The number of tennis balls is three-fifths times the number of tennis rackets
see the attached figure to better understand the problem
Answer:
12. 5(5x+4)(5x-4)
13. 2(4v+5)(4v-5)
14. 5(3x+2)(3x-2)
Step-by-step explanation:
Answer:
1/4
Step-by-step explanation:
5/20 = 1/4
hope this helps