Tammi deposited $520 into a bank account that earned simple interest each year. After 5 years, she had earned $156 in interest. No money was deposited into or withdrawn from the account.

What was the annual interest rate?

Enter your answer in the box

6%

Step-by-step explanation:

$156/5 years = $31.20 per year

$31.20/$520 = .06

.06 x 100 = 6%

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50