Question 1033351: The phone company Splint has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 320 minutes, the monthly cost will be $132. If the customer uses 520 minutes, the monthly cost will be $202.
Find an equation in the form of y = mx + b where x is the number of monthly minutes used and y is the total monthly of the Splint plan.
Use your equation to find the total monthly cost if 997 minutes are used.
Answer: If 997 minutes are used, the total cost will be dollars.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The phone company Splint has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone.
If a customer uses 320 minutes, the monthly cost will be $132. If the customer uses 520 minutes, the monthly cost will be $202.
132 = f + 320m
202 = f + 520m
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Subtract and solve for the per minute fee "m"
70 = 220m
m = 7/22 dollars
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Then f + 320(7/22) = 132
f = 132 - 101.81 = $30.18 (monthly fee)
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Equation:
y = 30.18 + (7/22)m
Use your equation to find the total monthly cost if 997 minutes are used.
Answer: If 997 minutes are used, the total cost will be dollars.
y = 30.18 + (7/22)997 = $347.41
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Cheers,
Stan H.
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