Stind ca n! = 1*2*3 * ... n sa se arate ca nr 13!-11! se divide cu 31

What is defined as the replacement of one skewed vector by two perpendicular vectors that when acting jointly have the same net effect as the original vector?

9. A population of caterpillars have been taking over a 250cm2 area of vegetable patch. Overnight they have been eating 3% of all the vegetation available to them. After 4 nights how many cm2 of the original vegetation is left?

A circular swimming pool holds 1.22 x 10^6 cubic inches of water. It is being filled at a rate of 1.5 x 10^3 cubic inches per minute. How many hours will it take to fill the swimming pool?

What is - 1/2x + 3 - 4x + 5 + 3/2x simplified? i did the problem and i got 5x - 8. am i correct?

Every even number, except 2, is composite

Suppose y varies directly with x write a direct variation equation that relates x and y when y = 6 and x=12 then find the value of y and x=10

A tennis player aces 3 out of every 25 serves. what is the probability that the tennis player will ace the next serve? Write the answer as a decimal or a fraction in simplest form.

How many sides can two distinct congruent angles share

Rick can mop the floor in 5 minutes. Together Rick and Nancy can mop the floor in just 4 minutes. How long would it take Nancy to mop the floor alone?

What are the maximum data rates of 802.11 legacy, 802.11a, 802.11b, and 802.11g?