Last year, keiko had $20,000 to invest. she invested some of it in an account that paid %7 simple interest per year, and she invested the rest in an account that paid %5 simple interest per year. after one year, she received a total of $1,280 in interest. how much did she invest in each account?

v = $220,000 * (1.038) is for one year = $228,360 +(5*1.038) simple interest = v =$228,365.19.

228,360 *5 = a. $1,141,180 this is comound interest.

answer:

does anyone know how to do this?

step-by-step explanation:

answer:

step-by-step explanation:

use this rule: (x^a)^b = x^ab

3(x + 2)^3/5 + 2 = 27

subtract 3 from both sides

3(x + 2)^3/5 = 27 - 3

simplify 27 - 3 to 24

3(x + 2)^3/5 = 24

divide both sides by 3

(x + 2)^3/5 = 24/3

simplify 24/3 to 8

(x + 2)^3/5 = 8

take the cube root of both sides

x + 2 = 3/5√8

invert and multiply

x + 2 = 8^5/3

calculate

x + 2 = 2^5

simplify 2^5 to 32

x + 2 = 32

subtract 2 from both sides

x = 32 - 2

simplify 32 - 3 to 30

x = 30