Question

Manny has two part-time jobs. She earns $21.00 per hour (a) working as an aerobics instructor, and $12.50 per hour (s) working at the skating rink. Her earnings are represented by the expression 21a + 12,5s . How much money will she earn working 4 hours as an aerobics instructor and 8 hours at the skating rink? $ Remember to include the dollars and cents.

Answer 1

To calculate Manny's earnings from both jobs, we can use the expression \( 21a + 12.5s \), where \( a \) is the number of hours worked as an aerobics instructor and \( s \) is the number of hours worked at the skating rink.

Given:
- \( a = 4 \) hours (as an aerobics instructor)
- \( s = 8 \) hours (at the skating rink)

Now substitute \( a \) and \( s \) into the expression:

\[
Earnings = 21a + 12.5s
\]

Substituting the values:

\[
Earnings = 21(4) + 12.5(8)
\]

Calculating each term:

1. \( 21(4) = 84 \)
2. \( 12.5(8) = 100 \)

Now add the two results together:

\[
Earnings = 84 + 100 = 184
\]

So, Manny will earn a total of **$184.00**.