Question

Giselle works as a carpenter and as a blacksmith. She earns $20 per hour as a carpenter and $25 per hour as a blacksmith. Last week, Giselle worked both jobs for a total of 30 hours, and earned a total of $690. How long did Giselle work as a carpenter last week, and how long did she work as a blacksmith?

Answer 1

I don’t know............

Answer 2

Answer:

Carpenter= 12 hours and Blacksmith= 18 hours

Step-by-step explanation

I started with a chart with hours that equaled 15.

20       25 <------ These are what she makes per hour

15   +   15 <------ These are the hours she works. The left 15 is $20 right is $25

20       25

15    +  15 = $675

14   +   16 = $680

13   +   17 = $685

12   +   18 = $690