Slope: (y2-y1)/(x2-x1)
(70-86)/(-6-18) = -16/-24 = 2/3
The slope is 2/3
6 1/4(x-2/3)=93/8 would mean x=7.972
The two equations are vertical angle, which would be equal to each other.
Set the equations to equal and solve for x:
5x -10 = 3x +40
Subtract 3x from both sides:
2x -10 = 40
Add 10 to both sides:
2x = 50
Divide both sides by 2:
x = 50 / 2
x = 25
The answer is B. 25
24 and 42, I got this by multiplying 5 and 2 then doing the same thing to 7 and adding the sums. I used this method to find the perimeter of 10 and 12 as well.