6th grade math help me please :)

A. when evaluating the expression you multiply n by 3

Step-by-step explanation:

B.

1. n = 2;  3n + 7

step 1:  multiply 3 (2) which will give you 6

step 2: add 6 + 7  which is 13

2. n = 5; 3n +7

step 1: multiply 3(5) and your answer is 15

step 2: add 15 + 7 and your final answer is 22

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.

the answer is 1030 it's very simple math.