Please help I need this answer. Answer ALL 3 questions to get free brainliest. Tyler’s brother works in a shoe store.

A: Tyler’s brother earns a commission. He makes 2.5% of the amount he sells. Last week, he sold $900 worth of shoes. How much was his commission?
B: The store bought a pair of shoes for $50, and sold it for $80. What percentage was the markup?
C: Tyler’s brother earns $12 per hour. The store offers him a raise—a 5% increase per hour. After the raise, how much will Tyler’s brother make per hour?

a. $22.50

b. 60%

c. $12.60/hr

Step-by-step explanation:

a. $900*0.025 = $22.50

b. $80-$50 = $30

$30/$50 = .60

.60*100% = 60%

c. $12*1.05 = $12.60

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.

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step-by-step explanation: