One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. How many minutes will it take them to do the job together?

6 min

12 min

24 min

Find the inverse function of y = x squared - 12

Evaluate the expression 34 : (14 - 5) * 2.

Jane evaluates x2 - 3x + 5 for x = - 2 below. Step 1: (-2) 2 - 3 (-2) + 5 Step 2: = - 4 + 6 + 5 Step 3: = 7 What, if any, was Jane's mistake?

A cone has a radius of 6 inches and a height of 30 inches. what is the exact volume of the cone?

Solve the system of linear equations below y=-2x+19 y=x+7

3. At a bargain store, Tanya bought 4 items that each cost the same amount. Tony bought 5 items that each cost the same amount, but each was $1.25 less than the items that Tanya bought. Both Tanya and Tony paid the same amount of money.

Can some one do these two i will put 20 pts What is the GCF of 8 and 32? 2 4 8 32 What is the LCM of 20 and 40? 5 10 20 40

Express each decimal as a fraction or mixed number in simplest form - 0.2 equals

4:9 and 32: x x = 32 x = 54 x = 72 x = 24

Calculator To determine how to crash activity times, a. shortest times with crashing must be known. b. normal activity costs and costs under maximum crashing must be known. c. realize that new paths may become critical. d.