What is the solution to this system of equations?
x − 2y = 15
2x + 4y = -18

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

In the diagram below,abc is congruent to dec what is the value of x