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What is the surface area of the solid above?

72 cm^2

Step-by-step explanation:

4 · 4 = 16

16 · 2 = 32

7 · 4 = 28

28 · 4 = 112

112 + 32 = 144

144 ÷ 2 = 72

72 cm^2

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9