First, we need to convert \(\displaystyle 73\) minutes into the combination of hours and minutes. One hour is equal to \(\displaystyle 60\) minutes therefore, we can rewrite \(\displaystyle 73\) minutes as the following:

\(\displaystyle 73 \text{ min}=60\text{ min}+13\text{ min}\)

and because

\(\displaystyle 60 \text{ min}= 1\text{ hour}\)

\(\displaystyle 73 \text{ min}= 1\text{ hour} + 13 \text{ min}\)

Now we need to add \(\displaystyle 1:13\) to \(\displaystyle 2:30\). 

\(\displaystyle 2:30 +1:13=3:43\).

Thus you wake up from your nap at \(\displaystyle 3:43\).

The first step in this process is to add two hours and fourteen minutes to \(\displaystyle 2:31\)pm.  Simply add them together, hours first, and then minutes:

Hours \(\displaystyle 2 + 2 = 4\)

Minutes: \(\displaystyle 31 + 14 = 45\)

So we know now that Andrew made it to his office at \(\displaystyle 4:45\)pm.  Add your final eight minutes to complete the problem:

\(\displaystyle 45 + 8 = 53\).

The hour has not changed, so we know that Andrew arrived at his desk at \(\displaystyle 4:53\)pm.  

To subtract time, subtract the minutes then subtract the hours.

\(\displaystyle \text{Hours}: 5-3=2\)

\(\displaystyle \text{Minutes: }17-34=-17\)

Since we can't have negative minutes, add 60 to the minutes and subtract 1 from the hours (60 minutes = 1 hour).

\(\displaystyle \text{Hours}: 2-1=1\)

\(\displaystyle \text{Minutes: }-17+60=43\)

First, start by adding up the total amount of time Nate spent on doing his homework.

\(\displaystyle 45+23+47+33=147\)

Now, subtract \(\displaystyle 60\) minutes until the number of minutes is less than \(\displaystyle 60\) to figure out how many hours and minutes it took him to do his homework.

\(\displaystyle 147-60=87\)

\(\displaystyle 87-60=27\)

Because we subtracted \(\displaystyle 60\) twice, we know that he has done \(\displaystyle 2\) hours and \(\displaystyle 27\) minutes worth of homework.

To figure out when he finished doing his homework, add the hours together then add the minutes together.

\(\displaystyle \text{Hours}:3+2=5\)

\(\displaystyle \test{Minutes}:0+27=27\)

So then he finished at \(\displaystyle 5:27pm\)

Add up all the individual items.

Billy had \(\displaystyle \$20.00\). After buying the toy he had \(\displaystyle \$10.51\) left over:

 \(\displaystyle (20-9.49=10.51)\).

After buying the candy bar he then had \(\displaystyle \$9.26\) left for his piggy bank,

 \(\displaystyle (10.51-1.25=9.26)\).

In order to solve this problem, you must add all of the costs of school supplies together. This can be done through the following equation: 

\(\displaystyle 23.45+1.35+2.34+0.60 = 27.74\)

Therefore, the total amount that John spent on school supplies is \(\displaystyle \$27.74\). 

You must subtract the cost of the two purchases from the overall paycheck amount.

Begin by subtracting the shoe purchase from the total paycheck amount:

\(\displaystyle \$245.74-\$61.39 = \$184.35\)

Then, subtract the cost of the dress: 

\(\displaystyle \$184.35-\$15.29 = \$169.06\)

\(\displaystyle \$169.06\) is the amount of money Jenny has left from her paycheck on Monday.

The key word, "approximately," indicates that we must round each of these values. Let's round to the nearest tens place because each of our answer choices is rounded to the tens place.

Shoes cost $42.64. 

$42.64 rounded (down) to the nearest tens place is $40.

Pants cost $37.99.

$37.99 rounded (up) to the nearest tens place is $40.

A shirt costs $21.34.

$21.34 rounded (down) to the nearest tens place is $20.

Let's add up our estimated prices.

$40 + $40 + $20 =

$100.

Since we're looking for an approximate value, we need to round our numbers up. Adding the three items gives a total of $60.74, so at least $61 is needed - thus $61 is the correct answer.