Giselle works as a carpenter and as a blacksmith. She earns \$20$20dollar sign, 20 per hour as a carpenter and \$25$25dollar sign, 25 per hour as a blacksmith. Last week, Giselle worked both jobs for a total of 303030 hours, and earned a total of \$690$690dollar sign, 690.
Answers
Giselle works as a carpenter and as a blacksmith. She earns \$20$20dollar sign, 20 per hour as a carpenter and \$25$25dollar sign, 25 per hour as a blacksmith. Last week, Giselle worked both jobs for a total of 303030 hours, and earned a total of \$690$690dollar sign, 690.
Step-by-step explanation:
$20/hr carpenter wages
$25/hr blacksmith wages
Let a = hours working carpentry
Let b = hours working as blacksmith
a + b = 30 {equation 1}
20a + 25b = 690 {equation 2}
In equation 1 solve for one variable in terms of the other.
a = 30-b
Substitute that into equation 2:
20(30-b) + 25b = 690
600 - 20b + 25b = 690
5b = 90
b = 90/5
b = 18 hours ( blacksmith)
a = 30-b = 30-18 = 12 hours ( carpenter)
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Answer:
Giselle worked as a carpenter for 12 hours and as a blacksmith for 18 hours last week.
Step-by-step explanation:
Hope this helps! :))