Question

Manny has two part time jobs. she earns $21 per hour (a) working as an aerobics instructor, and $12.50 per hour (d) working at the donut shop. her earnings are repersented by the expression 21a + 12.50d. How much money will she earn working 4 hours an an aerobics instructor and 8 hours at the donut shop

Answer 1

To calculate Manny's earnings for working 4 hours as an aerobics instructor and 8 hours at the donut shop, you can use the expression \(21a + 12.50d\), where \(a\) is the number of hours worked as an aerobics instructor and \(d\) is the number of hours worked at the donut shop.

Given:
- \(a = 4\) (hours as aerobics instructor)
- \(d = 8\) (hours at donut shop)

Now plug in the values:

\[
Earnings = 21a + 12.50d = 21(4) + 12.50(8)
\]

Calculating each term:

1. \(21(4) = 84\)
2. \(12.50(8) = 100\)

Now add the two amounts together:

\[
Earnings = 84 + 100 = 184
\]

So, Manny will earn **$184** for working 4 hours as an aerobics instructor and 8 hours at the donut shop.