Can someone me find the angle measurements

H(x)=4x2-5x h(-3) what is the answer?

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula,equation,to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles