Answer:
Correct choice is D
Step-by-step explanation:
Given the system of two equations:

Fro mthe first equation

Substitute into the second equation
instead of y:

Note that
then the second equation will take look

First subtract 4 from both sides

then simplify

add -5 to both sides

since a variable shouldn't be negative the answer should be

(I prefer having the variable on the left side)
Convert your feet to inches.
So 8 times by 12 = 96 inches
if you have 3/4 of the board used.
3/4= .75
if you were to times 96 by .75 = 72 inches.
So you used 72 inches and you have 24 inches left
now do 1/3= .33
times .33 by 24= 8
8 inches is how long you would give to Anthony's brother.
Answer:
-0.8333
Step-by-step explanation:
used omni calculator
https://www.omnicalculator.com/math/slope

This result is actually true for any exterior angle. The exterior angle of a triangle is equal to the sum of the two remote angles, and above is a short proof of it.