Question

The total number of cars in a dealership is modeled by f(x)=4x^2-2x, where x represents the number of rows of cars. how many rows are there in the dealership if it has a total of 650 cars?

Answer 1

Answer:

13

Step-by-step explanation:

f(x) = 650

f(x) = 4x^2 - 2x - 650 = 0

Use the quadratic formula

where A = 4 , B = − 2 , and  c= − 650.

Which will equal the equation in the image.

There will be 2 possible solutions: 13 or -12.5

Since the number of rows cannot be negative; therefore, there are 13 rows