Duive.
1. Eight is added to a number and the sum is doubled, the result is -11 less than the number. Find
the number

-27

Step-by-step explanation:

Number be x

Eight added to number: x+8

sum is doubled: 2*(x + 8)

-11 less than number: x -11

2*(x + 8) = x -11

2*x + 2*8 = x - 11

2x + 16 = x - 11

2x - x = -11 -16

x = -27

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high