Which of the following is the number of sides a polygon can have to form a regular tessellation?

A. 9

B. 2

C. 7

D. 5

How to find a rule with multiplication or division

The formula for the volume of a cone is V = Express the formula for the radius, r, of the cone.

Write and solve a word problem for 456. Divide by 6

Kelly wants to cut her birthday cake into 20 equal pieces. If she uses all of the cake, what is the correct angle she needs to cut to make 20 equal pieces of cake?

A stack of boards is in the storage shed. Each board is 2-1/5 inches high and there are 21 boards. How many inches high is the stack? a 231/2 b 46-1/5 c 42-1/5 d 231/5

There are 32 forwards and 60 guards in Leo's basketball league. Leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards.

Use the Distributive Property to rewrite each expression. 4 (x + 7)

X^2-12x+12=0 completing the square

Expand than simplify: 4 (7x+2y) + 8 (3x+5y)

Type the correct answer in the box. If cos x = sin (20 + x) ° and 0° < x < 90°, the value of x is °.