Which models selecting a combination of 3 objects taken from a group of 8 items?

A) 8C3 = 8!/5!

B) 3C8 = 5!/8!

C) 8C3 = 8! / (5!) 3!

D) 3C8 = 3! / (3!) 5!

How does the volume of a sphere with radius 2cm compare to the volume of a sphere with radius 1cm

Y and x have a proportional relationship, and y = 15 when x = 3. What is the value of x when y = 4?

SAT scores are normally distributed, with a mean of 1000 and a standard deviation of 200. a) If you scored 950, what would be your percentile? b) If you scored 1100, what percent of students scored better than you?

It is known that x1 and x2 are roots of the equation x2-8x+k=0, where 3x1+4x2=29. Find k. (note it is not 3x^1 and 4x^2 it is 3x sub 1 and 4x sub 2)

John has a jar with 100 marbles. The jar contains twice as many red marbles as yellow marbles, and three times as many green as yellow, and twice as many purple as red. How many red marbles in the jar?

A triangular pyramid with a height of 9 inches has a volume of 63 cubic inches. If the heights of a tringular bad is 6 inches what is the base length of the triangular base?

Factor. 9x^2+42xy+49y2 Enter your answer in the box.

4 cans for $2.48 how much does 1 cost?

Clyde simplified (j-8) - 2

Using the quadratic formula, solve the equation: 5.1x^2-1.7x-3.2