Which equations are true? Select all that apply.
16x2 – 64y2 = (4x – 8y)(4x + 8y)
16x2 – 18y2 = (8x – 9y) (8x + 9y)
O 22 – 169 = (x – 13)(x + 13)
2522 – 12 = (5x – 6)(5x + 6)
9x2 – 1 = (3x - 1)(3x + 1)

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.

Karen will divide her garden into equal parts. she will plant corn in 8/12 of the garden. what is the lowest number of parts she can divide her garden into?

If angle b measures 25°, what is the approximate perimeter of the triangle below? 10.3 units 11.8 units 22.1 units 25.2 units