Question

Both and tell why pls……..

Answer 1

4) A

5) E

Explanation:

#4

`(x)/(y)=(1)/(10) * (z)/(y)`

`(x)/(y) =(1z)/(10y)`

Cross multiply the equation and you get:

`10xy=zy`

Since
`(a)/(b)=(c)/(d)` is the same thing as
`ad=bc`, you can change the equation into
`(x)/(z) =(y)/(10y)`

Cancel out the y on the top and bottom and you get 1/10

#5

`(2)/(3) *(x)/(2) =5`, simplify and you get
`(x)/(3) =5` so x=15

`(1)/(5) * 3(x)` is equal to
`(1)/(5) *3(15)` after you plug in x, and that is equal to 9