Question

Help -8(9n-10) -20 a. 90n+54 b. -72n+60 c. -17n – 80 d. -160n

Answer 1

B. -72n+60

Explanation:

We are given the expression:

-8 (9n-10) -20

We want to simplify the expression. First, distribute the -8.

Multiply each term inside the parentheses by -8.

(-8 * 9n) + (-8*-10) -20

-72n + (-8 * -10) -20

-72n + 80 -20

Next, combine like terms. Currently, we have two constants (terms without variables) that can be combined.

Subtract 20 from 80.

-72n + (80-20)

-72n + 60

The expression: -8(9n-10)-20, simplified is -72n+60. Therefore, the correct answer is B. -72n+60

Answer 2

1) -8(9n-10) - 20

-72n + 80 - 20

-7n + 60

Can't factor

2) 90n+54

18(5n+3)

3) -72n+60

-12(6n-5)

4) -17n - 80

Can't factor

5) -160n

Can't factor