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NAPA Car Parts
Thanks
Garage
Answer:
19
tires for $950.00
1
wiper blade for
$10.00
80
spark plugs for
$40.00
John E says
15 tires at $750 total,
20 blades at $200 total,
100 plugs at
$50 total = $1,000.
AI answer
Let x be the number of tires, y be the number of wiper blades, and z be the number of spark plugs.
We know that the mechanic buys 100 car parts,
so x + y + z = 100.
We also know that he spends $1000,
so 50x + 10y + 0.5z = 1000.
Solving this system of equations, we get x = 10, y = 10, and z = 80.
Therefore, the mechanic buys 10 tires, 10 wiper blades, and 80 spark plugs.
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