A regular polygon has possible angles of rotational symmetry of 20°, 40°, and 80°. How many sides does the polygon have?

What is 382 3/10 - 191 81/100 equal

You have two parents, four grandparents, eight greatgrandparents, and so forth. a. If all your ancestors were distinct, what would be the total number of your ancestors for the past 40 generations (counting your parents' generation as number one) ?

Mary covered her kitchen floor with 10 tiles. The floor measures 6 feet long by 5 feet wide. The tiles are each 3 feet long and w feet wide. Write an equation to represent this

What is 2x-4. I really don't understand

Which set of coefficients of the terms in the expansion of the binomial (x + y) 3 is correct?

Which value of x makes this inequality true? X + 9 < 4x

Find the value of f (-8) if:f (x) = 12x-29

How to explain that x/y can result in either a positive or negative quotient

Simplify 2a2b3 (4a2 + 3ab2 - ab) = ? A. 8a4b3 + 6a3b5 + 2a3b4 B. 8a4b3 + 6a3b5 - 2a3b4 C. 8a4b5 + 3a3b5 - 2a3b4 D. 8a4b5 + 3a3b5 + 2a3b4

If m squared minus 5 over 2 m equals negative 11 over 2 what does m equal