Question

Let x be the number of books and y be the number of magazines you can buy. Which of the following represent(s) a possible solution to the equation 10x +4y = 40? Select all that apply.

(0, 10)

(3, 2.5)

(-2, 15)

(2, 5)

Answer 1

(0, 10)

Explanation:

substitute the value of x,y given into the formula, that equates 40.

10x + 4y = 40

let x = 0, y = 10 ; 10(0) + 4(10) = 40 √

let x = 3, y = 2.5 ; 10(3) + 4(2.5) ≠ 40 x

let x = -2, y = 15 ; 10(-2) + 4(15) ≠ 40 x

let x = 2, y = 5 ; 10(2) + 4(5) ≠ 40 x

therefore, (0, 10) is the right answer

Answer 2

Explanation:

so what you are going to do is subsitute all the x axis coordinates with the x in the equation they gave you and then do the same with the y for example A.

10(0)+4(10)=40