Question

What is the value of b in this equation?

A. -20
B. -6
C. 6
D. 20

Answer 1

B

Explanation:

Using the rules of exponents

`(a^m)^(n)` =
`a^(mn)`

`a^(-m)` =
`(1)/(m)`

Then

`(y^b)^(4)` =
`(1)/(y^(24) )`

`y^(4b)` =
`y^(-24)`

Equate the exponents

4b = - 24 ( divide both sides by 4 )

b = - 6 → C

Answer 2

Explanation:

a- 12

b- 2

c- 11

and the next part is

x- 6

y- 18