Expand the expression.
-7 (6 - 3)
-k - 21
-7k + 21
-7k - 21
k + 21

(B.) -7k+21

Step-by-step explanation:

Your first step should be to solve your original expression.

-7×6=-42

-7x-3=21.

You're finishing numbers are -42 and 21.

-7k can equal to -42 if k is 6.

So we can use -7k

Since -7x-3=21, Then the answer would have to be:

-7k+21.

explanation:

step-by-step explanation:

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.