Find the least common denominator for these two rational expressions. b/b^2 -64 -7b/b^2+7b-8

The least common denominator is (b-8)(b+8)(b-1)

Step-by-step explanation:

We are given expression as

Firstly, we will factor both denominators

so, we can plug it back

First term denominator is

(b-8)(b+8)

Second term denominator is

(b+8)(b-1)

So,

Least common denominator will be

(b-8)(b+8)(b-1)

So, we get

- 70

this is the answer for you hope it

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls