Can someone check my answers ? : ) 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 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