180g of copper is mixed with 105g of zinc to make an alloy. The density of copper is 9g/cm^3 and the density of zinc is 7g/cm^3. Work out the volume of copper used in the alloy.

Roxanne's car used 4.8 gallons of gasoline to drive 124 miles. If Roxanne has 180 more miles to go, which is closest to the additional number of gallons of gasoline the car will use to complete the trip?

Find the difference 9/11-5/12

The expression 2x+50 represents the elevation above sea level, in meters, of a rock climber after x minutes of climbing. What is the rock climber's

Solve the follow 3 (2z-4) = 60

6 miles is approximately to 9 km. How many km Are equal to 54 miles. How many miles are equal to 12km

Marta has $10 more than twice as much money as Heidi has. Together they have $36. How many money does each girl how. how does Heidi have

t a hockey game, a vender sold a combined total of 231 sodas and hot dogs. The number of sodas sold was two times the number of hot dogs sold. Find the number of sodas and the number of hot dogs sold.

9y+11z+7y-4z What is the answer? 16y + 7z 16y + 15z 2y + 7z 23yz

120 bacteria in a petri dish double every 30 minutes. Write an equation for the amount of bacteria after x hours.

What times what equals 204