3 Rewrite the following equation as a function of x. 21x+3y-45=0 A. f(x)= 7x-15 B. f(x)=-7x-6 C. f(x)=3x+6 D. f(x) = -7x + 15

Question

asked Nov 15, 2024 109k views

1 Answer

Evan Cordell · Answer 1 · 2024-11-21T19:19:47+0000

Answer:

D. -7x + 15

Explanation:

In order to rewrite the equation as a function of x, we have to isolate y on the left-hand side of the equation:

$(21x+3y-45=0)+45\\(21x+3y=45)-21x\\(3y=-21x+45)/3\\y=-7x+15$