Melanie sold half of her comic books and then bought 7 more. She now has 18. How many did she begin with?

Use the formula d=rt to find the value of the missing variable. d=80 feet, t=16 seconds. r=__ft/sec?

A smaller number is 3 less than half a larger number. The larger number is 10 times 1 less than the smaller number. Let x represent the smaller number, and let y represent the larger number. Which equations can be used to model the situation?

The United States Air Force has 19 women for every 81 men enlisted. If a squadron has 250 members how many are men

The interior angles of a triangle have measures (2x-5) °, (4x-1) °, and 30°. What is the value of x?

What is the solution to the system of equations? {-2x+5y=-163x-4y=17 (-2, 3) (-3, -425) (813, 2) (3, -2)

You travel for 450 miles and it takes you 7 hours. What is the average rate?

What is the solution to the inequality? -4x-8>-20 x<3 x>3 x>-3 x<-3

If (b + 6) / 3 = (d + 4) / 2, then b/3 = ? ? is it d/2?

Use the laws of exponents to express 9-3/2 · 82/3 as a simple fraction. Show the steps in the simplification

Of the students on the track team, 1twelve do the high jump. Of those students 1fourth alsobdo of the long jump. What fraction of the students do both the high jump and the long jump