Question

Given the quadratic equation below, determine which situation it could represent. x^2-4x=60

Answer 1

Answer:

C.  In a meeting room for a business event, there are 4 fewer chairs laid out in each row than the number of rows. The total number of chairs in the room is 60.

Step-by-step explanation:

To find the total number of chars, we multiply the number of rows by the number of chairs in each row.

Let the number of rows be x.  There are 4 fewer chairs in each row than the number of rows; this gives us (x-4).  Together, this gives us

x(x-4).

We know there are 60 chairs; this gives us

x(x-4) = 60

Using the distributive property,

x(x)-4(x) = 60

x²-4x = 60