5.7
Pythagorean Theorem is a² + b² = c²
Answer: choice C) -2/3
The line X is completely straight meaning that the slope of line X is the same no matter which two points you pick. Since we're given that line X has a slope of -2/3 through the points (-7,6) and (-4,4), this also applies to the portion from (-1,2) to (5,-2)
5(2x-3)-(x+8)=13
10x-15-x-8=13
9x-23=13
9x=36
x=4
The answer is six and two out of seven or 6 and two sevenths