Atruck can be rented from company a for $80 a day plus $0.30 per mile. company b charges $20 a day plus $0.50 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

Write equations for both companies:

Company A = 80 + 0.30x

Company B = 20 + 0.50x

X = number of miles.

Set the equations to equal and solve for x:

80 + 0.30x = 20 + 0.50x

Subtract 0.30x from both sides:

80 = 20 + 0.20x

Subtract 20 from both sides:

60 = 0.20x

Divide both sides by 0.20:

x = 60 / 0.20

x = 300

The answer is 300 miles.

77

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value