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

Question

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

Answer 1

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