8. Mark can clean his father's office in 30 minutes. His younger sister Lynn can clean the office in 40 minutes. How long will it take the two of them together to clean the office?

For an object moving in a circular path, which quantity is always changing?

Martha states that - 6 is a rational number. which is a correct explanation for this statement?

Suppose you have 34 bread slices and 24 cheese slices. how many cheese sandwiches can you make

There are 10 gallons of water in a tank. Each minute, 4 more gallons are added. The volume of the water in a tank after t minutes is V (gallons). What is the formula for the dependence of V on t (t≤10) ?

Mount Everest at 29,035 feet is the highest mountain in the world. Mount aconcagua at 22,834 feet is the highest mountain in the western hemisphere. Mt Everest is how many yards more than a mile higher than Mount Aconcagua

One face of a cube has an area of 25 cm. what is the volume of the cube?

Julia charged $612 to her credit card. The cost of her next purches caused her to go over her credit limit of$2000. If c=the cost in dollars of Julia next purches, which mathematical sentence expresses in information above

Round 7304 to the nearest thousand

1.424 as a mixed fraction

What is the factor of 4x^2-25