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 represented by the expression 21a+12.50d
21
𝑎
+
12.50
𝑑
. How much money will she earn working 4 hours as an aerobics instructor and 8 hours at the donut shop?(1 point)
Responses
$134
$134
$218
$218
$33.50
$33.50
$184
$184
21
𝑎
+
12.50
𝑑
. How much money will she earn working 4 hours as an aerobics instructor and 8 hours at the donut shop?(1 point)
Responses
$134
$134
$218
$218
$33.50
$33.50
$184
$184
Answers
GPT-4o mini
To find out how much money Manny will earn working 4 hours as an aerobics instructor and 8 hours at the donut shop, we can substitute \( a = 4 \) and \( d = 8 \) into the earnings expression \( 21a + 12.50d \).
Calculating:
\[
21a + 12.50d = 21(4) + 12.50(8)
\]
Calculating each part:
1. For the aerobics instructor:
\[
21(4) = 84
\]
2. For the donut shop:
\[
12.50(8) = 100
\]
Now, add these two amounts together:
\[
84 + 100 = 184
\]
So, Manny will earn **$184**.
The correct response is:
**$184**
Calculating:
\[
21a + 12.50d = 21(4) + 12.50(8)
\]
Calculating each part:
1. For the aerobics instructor:
\[
21(4) = 84
\]
2. For the donut shop:
\[
12.50(8) = 100
\]
Now, add these two amounts together:
\[
84 + 100 = 184
\]
So, Manny will earn **$184**.
The correct response is:
**$184**