Twin more than 4 times a number is -18

4x+2=-18    x=-5

Step-by-step explanation:

4(-5)+2=-18

-20+2=-18

-18=-18

4 x n + 2 = -18 or

N = -5

Step-by-step explanation:

I assume you mean two, so

When it says “than” in the question, you put it before the number (so example

5 more than x = 7

X + 5 = 7)

So,

4 x n + 2 = -18

-2

4 x n = -20

/4. /4

N = -5

Step-by-step explanation:

1) If the diameter is included:

2(4)*pi/2+2(4)

4pi+8

2)If it isn't included

2(4)*pi/2

4pi