Angle measurements if 2x+6 with x equals 7 which angle should I measure

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building