The time t required to drive a certain distance varies inversely with the speed r. If it takes 4 hours to drive the distance at 35 miles per hour, how long will it take to drive the same distance at 45 miles per hour?

3 000 000 000+200 000 000+600 000+20 000+9

Scott needs to memorize words on a vocabulary list for German class. He has six words to memorize and he is 2/3 done. How many words has Scott memorize so far?

What is 2/9 : 9 for mathematics

Estimate than use the break apart strategy for 495+254

A book vendor is trying to sell his booking collection. One customer buys 1/4 of his books, another buys 1/3 of his books, and a third buys 1/6 of his books. If the vendor is left with 15 books, how many did he start out with?

A quantity, y, varies directly as x. When y = 9, x = 4. Find y when x = 10

A drawer contains 9 black socks, 8 gray socks, and 7 blue socks. Without looking, you draw out a sock and then draw out a second sock without returning the first sock. What is the probability that the two socks you draw are the same color?

All possible random samples of 200 middle managers are selected from a population for a study concerning their mean annual income. The population standard deviation is computed to be $2,248.5.

Find the length of the hypotenuse of a right angle if a = 6 and b = 10

3. Sandy bought 9 animal pencils that cost 8C each. How much money did she spend?