What times blank equal 90 and a 100

Two people working together can complete a job in 5 hours. If one of them works twice as fast as the other, how long would it take the faster one working alone?

Suppose that the function u and w are defined as follows. u (x) = - x - 2 w (x) = 2 x^2 Find the following. (u o w) (4) = __ (w o u) (4) = __ I really have no idea what this is

122:668 for Saxon math

0.582/0.75 with the awnser rounded to nearest tenth

A system has a total mechanical energy of 350 J and kinetic energy of 220 J. What is its potential energy?

Swimming Fleury swam 6 laps the first day, 15 laps the second day, 24 laps the third day, and so on. On which day will fleury swim 51 laps if the pattern continues?

1/8 divided by 1/2 divide write in simplest form. Check by multiplication

What is the next number in this geometric sequence? - 3.49, 10.47, - 31.41, 94.23, A. - 188.46 B. 188.46 C. 282.69 D. - 282.69

Must choose a number between 55 and 101 that is a multiple of, 69, and 18.

The money used in Saudi Arabia is the Riyal. The exchange rate is 4 Riyals to 1 dollar. How many Riyals would you receive if you exchange 5 dollars?