Is there a picture of some sort of angle or parallelogram? Because there isn't enough information to solve the question with only this. Sorry!
17/20 is equivalent to 0.85. To get this answer, one must divide 17 by 20 using long division.
A earns $350×0.04×5 = $70 interest in interest over five years.
B earns $500×0.035×5 = $87.50 in interest over five years.
Do C the same way.
3a = a + 22
Take away a from both sides:
2a = 22
Divide both sides by 2:
a = 11
Answer: a = 11
