We know that all angles in a rectangle equal 90 degrees, so we have to find a value for a that multiplies by 12 that equals 90 when added with 24 (in other words, write an equation).
12a + 24 = 90
Lmk if u need any extra help :)
The square root of 147 when rounded to the nearest tenth is about 12.1
The point B has coordinates (-4,2) and C has coordinates (-2,-2). We are going to calculate the slope of the line

Then, we are going to calculate the intercept using the slope m=-2 and the point (-4,2).
y=mx+b
2 = -2*(-4)+b
Isolating b we get
2-8=b= -6
The equation would be
y=-2x-6, option A
9 or 27 not quite sure gl