35w+9w+35w^3+25w^3–25w^3

pls help

What is always true about a positive integer raised to a negative odd power?

What else equals 42 and 30 for multiply

"which statement is necessarily true if bd is an altitude to the hypotenuse of right ? abc? a.) ? adb? ? bdc b.) ? adb~? bdc c.) abbc=acbd d.) ? bac? ? bdc"