Question

17. Write y = –0.5x + 0.8 in standard form using integers. (1 point)
A.5x – 10y = 8
B.5x + 10y = 8
C.–5x + 10y = 8
D.–5x – 10y = 8

Answer 1

First you can say that: y = -(5/10)x +8/10

In order to turn the coefficients from fractions into integers ("counting numbers"), all you have to do is multiply each side by 10.

10*(y) = (10*((-5/10)x +8/10))

So on the left side, you have 10y, and on the other side, the 10 on top and bottom cancels out.

10y = -5x +8

Or like how they have it written:

5x +10y =8

Answer 2

@Luis Rivera , shouldn't it be 5x +10y =8?

Answer 3

I do it all the time with negative signs ...