The product of the sum of a number and 3 and difference of 20 and twice a number

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%

What is the perimeter of an equilateral triangle if each side is (x+3)?

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?