1. Write the following statements as an expression: a. 12 more than a number

b. 15 less than a number

c. Four times a number added to 7

2. Are the following expressions equivalent? Explain.
5(2n - 4) 10n - 4

if answered correctly will give brainiest and 108 points

a.) x+12

b.) x-15

c.) 4x+7

2.) the following expression are equivalent because 5 multiplied by 2n would be 10n and then the rest of the expressions are similar.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

x = 3 ± √(5+y)