Set up the following proportion:

,

where  is the number of miles the cities are apart.

Now, solve for .

The two cities are  miles apart.

First, find the area of the driveway.

Since it takes  pounds of cement per square feet,

 pounds will be needed to complete the driveway.

First, find out how long it will take her to finish  math problem.

Since it takes Joanna  minutes to finish one problem, multiply this number by the amount of questions she needs to do.

It will take her  minutes to finish  questions.

Divide the number of miles by the number of hours to get the number of miles per hour.

The phrase "bags of oranges does he use per gallon" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have bags of oranges, , divided by gallons, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

Joe will use  bags of oranges to fill a gallon of juice. 

The phrase "per hour" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have yards, , divided by hours, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

The landscaper can mow  yards per hour. 

The phrase "per hour" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have the portion of the mall, , divided by hours, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

Hannah can shop in  of the mall per hour. 

The phrase "miles per hour" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have miles, , divided by hours, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

Charlie can walk at a speed of:

The phrase "miles per hour" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have miles, , divided by hours, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

Alan can walk at a speed of:

The phrase "miles per hour" gives us a clue that we are going to divide. In this problem, we can replace the word "per" with a division sign; therefore, we will have miles, , divided by hours, :

Remember that when we divide fractions, we can simply multiply by the reciprocal of the denominator to solve. 

Therefore:

Jake can walk at a speed of: