At a bakery, cupcakes cost $4 each and brownies cost $3 each. Which equation represents the total cost, T, of c cupcakes and b brownies?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

What is the value of x? enter your answer in the box.

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours