1. In this question subtraction operation will be used.
Let the price of printer be = p
Total amount paid = $650
Price of computer = $525
So, the price of printer will be , ![p=650-525=125](https://tex.z-dn.net/?f=p%3D650-525%3D125)
Hence the price of printer is $125.
2. In this question subtraction operation will be used.
Let the number of missing items be = m
Number of products ordered = 27
Number of products received = 19
So, number of missing orders =![m=27-19=8](https://tex.z-dn.net/?f=m%3D27-19%3D8)
3. In this question, division operation is used.
Let the cost of one lipstick = L
Cost of 4 lipsticks = 20
Cost of 1 lipstick =![L=\frac{20}{4}=5](https://tex.z-dn.net/?f=L%3D%5Cfrac%7B20%7D%7B4%7D%3D5)
Hence, the cost of 1 lipstick = $5
4. In this question, division operation is used.
Let the number of hours taken to do 30 surveys = h
6 surveys are done in = 1 hour
1 survey is done in = ![\frac{1}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B6%7D)
so, 30 surveys will be done in =
hours.
5. In this question. addition and division operations are used.
Let the average be = A
![A=\frac{sum of events}{number of events}](https://tex.z-dn.net/?f=A%3D%5Cfrac%7Bsum%20of%20events%7D%7Bnumber%20of%20events%7D)
Sum of scores = ![92+87+88=267](https://tex.z-dn.net/?f=92%2B87%2B88%3D267)
A=![\frac{267}{3}=89](https://tex.z-dn.net/?f=%5Cfrac%7B267%7D%7B3%7D%3D89)
Hence, average is 89.
6. In this question, multiplication operation is used.
Let the amount spent on tickets be = t
As given, Brendon and Ed each bought tickets to 4 games, so total tickets bought = 8
Cost of 1 ticket = $12
Cost of 8 tickets = ![12\times8=96](https://tex.z-dn.net/?f=12%5Ctimes8%3D96)
Hence total amount is $96.