locksmith larry charges $90 for a house cal plus $20 per hour. Locksmith Barry charges $50 for a house call plus $30 per house. When will both locksmith charge the same
1 answer:
Answer:
<u>4 hours </u>
Step-by-step explanation:
Equations :
Larry : <u>y = 20x + 90</u>
Barry : <u>y = 30x + 50</u>
Equate both to find the number of hours at which they both charge the same :
20x + 90 = 30x + 50 30x - 20x = 90 - 50 10x = 40 x = <u>4 hours </u>
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Answer:
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Number of children = 1/2 ( Adults)
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