a cog company produces 20 cogs a day, 4 of which are defective. Find the probability of selecting 4 cogs from the 20 produced where all are defective?

Kishauna rode her bike for 35 minutes each on Monday Wednesday and Saturday and 55 minutes each on Tuesday and Thursday. write an expression that shows the total amount of the time she spent riding her bike. than evaluate the expression

A manufacturer packages 6 mini-boxes of sweetened cereal and 8 mini boxes of unsweetened cereal together. You select 2 boxes at random without replacement. What is the probabilty that both boxes you select will be unsweetened cereal? A. 16/49 B.

What is the order of the mass of electrons from least to greatest 12.4x10^-3, 14x10^2, 0.0013X10^3, and 157x10^4

4x+8=2x+7+2x-20 Solve the equation and show your work. Tell whether it has one solution, an infinite number of solutions, or no solutions, and identify each equation as an identity, a contradiction, or neither.

The SAT mathematics scores in the state of Florida for this year are approximately normally distributed with a mean of 500 and a standard deviation of 100.

a flat rectangular piece of aluminum has a perimeter of 64 inches. the length is 10 inches longer than the width. find the width

How many triangles can you draw which have one side of length 4 cm, one side of length 7 cm, and one side of length 12 cm?

Multiply and simplify: 10x (9x^2 + 6x + 7)

B ∩ U A = U (B ∩ A).

Kylee bought a pack of 12 cookies. one-third if the cookies are peanut butter. How many of the cookies in the pack are peanut butter?