What are the factors of x^2-81

A.) (x+9) (x-9)

B.) (x-9) (x-9)

C.) (x+3) (x-27)

D.) prime

How many sides does a regular polygon have that has an angle of rotation equal to 20 degrees? how many lines of symmetry will it have?

The height of cone is 30 cm & radius 6 cm. a small cone is cut off at the top of a plane || to base. the radius of cone is 3 cm. if the volume is 1/9 of the volume of the given cone, at what height above the base the section is made.

What is the mean of the data set? Heart Rate 5 | 0 6 | 0 0 0 7 | 0 0 8 | 0 0 9 | 0 5 | 0 = 50 beats per minute 1. 70 2. 68 3. 69 4. 60

If it says "the speed of the car must be no more than 63 miles per hour" what inequality represents the situation

3y*2x+5 if x=3 and y=4

In arithmetic sequence a3=0 a7=12 find s10

A music store is having a sale where you can buy 2 new releases CDs for $22 or you can buy 4 new releases CDs for $40 are these rates equivalent

If the regular price of a skateboard is $89 what is the discounted price

Six times the sum of a number and 3 equals 5

164,215 rounded to the nearest ten thousand