PLEASE HELP!

Find the value of x. IMAGE BELOW
a) 20.485
b) 35.631
c) 86.113

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

In the right triangular prism below, bg ⊥ fc. the volume of the prism is 900 cubic centimeter the height of the prism is 15 centimeters and the height of the triangular base is 10 centimeters. what is your he length of edg fc