Maria can clean the entire house in two hours. Her sister, Sasha, can clean the house in three hours. How long would it take for two of them to do the job together?

When the whole is the same, why does it take 4 copies of 1 tenth to equal 2 copies of 1 fifth?

There are 38 students in Ms. Flanigan's math class and 20 of them are boys. If a student is selected at random, what is the probability that a girl is selected? Give your answer as a fraction in simplest form.

What does - 6 (-5) + 12 equal

Write the ratio as a fraction in simplest form without any units 14 days to 5 weeks

Ashlee has finished 7/25 of her homework what percent of the homework does Ashlee still need to finish

The weight of an object on a particular scale 155. 2lbs the measured weight May very from the actual weight by the most 0.4 lbs what is the actual weight of the objects

Circumferenceif a circle is 62.8inches, whats is the radius

What is a letter or symbol that represents some unknown value

Write a percent proportion and solve each question 1) 39 is 5% of what number? 2) 90 is 36% of what number? 3) 22 is 25% of what number? 4) 6 is 75% of what number?

Cecilia traveled to Canada and bought a new lamp for 460 Canadian dollars. If the Canadian dollar is worth $.8817 against the U. S. dollar, how much would the same lamp cost in the United States? (Round to the nearest cent.) A. $405.58 B. $517.77 C.