69 points !

which shows how to find the y-coordinate of the point that will divide cd into a 5: 2 ratio using the formula y = (y2 – y1) + y1?
a. y=[5/2](3-1)+1
b. y=[5/2](3+4)-4
c. y=[5/7](3-1)+1
d. y=[5/7](3+4)-4

The scale factor between the two triangles is so x is so x =9

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!