Can someone check my answers please? :)

QUESTION 9

Katie earned $1200 in 8 years on an investment at a 6% annual simple interest rate. How much was Katie’s investment?



$945

$2500

$4500

$9000
5 points

QUESTION 10

Glenn invested $15,000 at 3% interest compounded annually.
How much interest will Glenn earn in 4 years?



$2837.25

$16,882.63 *

$20,837.25

$1882.63
5 points

QUESTION 11

A sweater originally costing $80 is now on sale for $60. Determine the percent decrease.

25% *

20%

30%

15%
5 points

QUESTION 12

The__________ method is a way of solving a system of equations using addition or subtraction to eliminate a variable.

linear combination *

substitution

empty set

like term

Answers marked with * are my answers