Question

Given the quadratic equation below, determine which it could represent.

X^2-4x=60

A: A wall in Liza's bedroom has an area of 60 square feet. She covers 4 square feet of the wall with a poster.
B: on Tuesday, a packaging company packed 4 fewer boxes of cashews than they did on Monday. They packed a total of 60 boxes.
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.
D:Mr.Bass is 4 years older than his sister. The total of their ages is 60 years.

Answer 1

C

Explanation:

Correct option is C.

Let x be the number of rows in a meeting room. If there are 4 fewer chairs laid out in each row than the number of rows, then in each row there are x-4 chairs.

The total number of chairs is

`x(x-4)`

The total number of chairs in the room is 60. Hence,

`x(x-4)=60`