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2 years ago

9

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:

nadya68 [22]2 years ago

4 0

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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