What is the justification for step 2 in the solution process? 12y - 40 - 4y = 6y - 18
Step 1: 8y - 40 = 6y - 18
Step 2: 2y - 40 = -18
is it a multiplication , subtraction , division , or addition property of equality ?

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?