Find the value of the expression 7a - 3/2 when a = 1/2

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.