in the coordinate plane , line a has a slope of - 2 and an x - intercept of 2 . line b has a slope of 5 and a y - intercept of - 10 . if the two lines intersect at the point ( a , b ) , what is the sum a + b ?
"the equation of line a is y = - 2 x + 4 the equation of line b is y = 5 x - 10 5 x - 10 = - 2 x + 4 x = 2 y = 0 the point of intersection is ( 2,0 ) and then a + b = 2 . the answer is c ."
divide(subtract(subtract(10, 5), 2), 2)