Which expression correctly shows 20x4−25x3+60x2−75x factored completely over the integers?

a: 5x(x2−3)(4x+5)
b: 5x(x2+3)(4x−5)
c: 5x2(x+4)(3x−5)
d: (x2+3)(4x−5)

Solve for x. −3/4(x+2)=6 enter your answer in the box

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

Is the ordered pair (-10, 7) a solution to the equation y = 17 – x? yes or no