Question

An automobile factory is assembling cars and they need to have all of the parts in stock at the assembly line. each car needs four tires and a spare tire for the trunk. if they produce c cars per day, what formula shows how to calculate the number of tires, t, needed? a. c = 4 t 1 c. t = 4 c 1 b. t = c 4 d. t = 5 c

Answer 1

The formula which shows how to calculate the number of tires, t, needed if they produce c cars per day is t = 5c. option D

Equation

• Number of tires needed by each car = 4
• Number of spare tires needed by each car = 1

Total tires needed by each car = 4 + 1

= 5

• Number of cars produced per day = c

Total number of tires, t needed for c cars.

Number of tires needed, t = Total tires needed by each car × Number of cars produced per day

t = 5 × c

t = 5c

For instance,

if 5 cars are produced per day

Number of tires needed, t = Total tires needed by each car × Number of cars produced per day

t = 5c

= 5 × 5

t = 25 tires

Therefore, the formula which shows how to calculate the number of tires, t, needed if they produce c cars per day is t = 5c. option D

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