Problem 3: Serena is the manager of the coffee shop. The amount of money she earns is represented by the equation m=21h, where h is the number of hours Serena works, and m is the amount of money she earns. How much more money does Serena make an hour than Gabe? Explain your thinking.

Serena earns $7.50 per hour more than Gabe

Step-by-step explanation:

Given

Serena:

Gabe

Earnings: $13.50 per hour  ----- Missing Part of equation

Required

How much more does Serena earn per hour

For Serena

implies that She earns $21 per hour

So, to determine how much more She earns, we simply calculate the difference.

(per hour)

(per hour)

The difference implies that Serena earns $7.50 per hour more than Gabe

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b