Question

Jonas earns $9 per hour as a lifeguard and $11 per hour as a swim instructor. Last week he worked a total of 40 hours at the pool, 10 of which were teaching swim lessons. Which expression and value show the total amount of money that he earned last week? 9 × 10 + 11 × 30; $420 9 × 10 + 11 × 30; $210 9 × 30 + 11 × 10; $419 9 × 30 + 11 × 10; $380

Answer 1

Answer:

The correct answer is D.  9 × 30 + 11 × 10; $380

Step-by-step explanation:

Let's write the correct equation to help Jonas to find out his earnings last week, this way:

Number of hours worked by Jonas last week = 40

Number of hours worked by Jonas last week as swim instructor = 10

Number of hours worked by Jonas last week as lifeguard = 30

Rate per hour as lifeguard = $ 9

Rate per hour as swim instructor = $ 11

Now, we can answer the question:

Total earnings last week = 30 * 9 + 10 * 11

Total earnings last week = 270 + 110 = $ 380

The correct answer is D.  9 × 30 + 11 × 10; $380

Answer 2

Answer:

The answer is D, short and simple.