Answer:
Step-by-step explanation:
7x+4y=10
y=x-14
replace y,
7x+4(x-14)=10
7x+4x-4*14=10
11x-56=10
11x=56+10
11x=66
x=66/11
x=6
Dilation by a scale factor of 2 followed by reflection across the x-axis
Answer: -x - 5y + 19 = 0, choice A
All we're doing is adding 19 to both sides to get everything on the same side.
General form is Ax+By+C = 0. Some books use Ax+By = C which is just a variation of the same idea.
