<u>Solution-</u>
1.
Bill bought a computer and a printer for a total of $650.
Let p stand for the cost of the printer, so
![\text{Cost of the computer + p} =650](https://tex.z-dn.net/?f=%5Ctext%7BCost%20of%20the%20computer%20%2B%20p%7D%20%3D650)
![\Rightarrow 525+p=650](https://tex.z-dn.net/?f=%5CRightarrow%20525%2Bp%3D650)
![\Rightarrow p=650-525=125](https://tex.z-dn.net/?f=%5CRightarrow%20p%3D650-525%3D125)
2.
Bonnie ordered 27 products from one company
Let m stand for the number of missing items
![\text{Number of item she got + m} =27](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20item%20she%20got%20%2B%20m%7D%20%3D27)
![\Rightarrow 19+m=27](https://tex.z-dn.net/?f=%5CRightarrow%2019%2Bm%3D27)
![\Rightarrow m=27-19=8](https://tex.z-dn.net/?f=%5CRightarrow%20m%3D27-19%3D8)
3.
Terri bought four lipsticks for a total cost of $20
Let l stand for the cost of one lipstick.
![Price\ of\ one\ lipstick \times I=20](https://tex.z-dn.net/?f=Price%5C%20of%5C%20one%5C%20lipstick%20%5Ctimes%20I%3D20)
![\Rightarrow 4 \times I=20](https://tex.z-dn.net/?f=%5CRightarrow%204%20%5Ctimes%20I%3D20)
![\Rightarrow I=5](https://tex.z-dn.net/?f=%5CRightarrow%20I%3D5)
4.
Each survey takes him about 10 minutes to complete
Let h stand for the number of hours
![Tota\l time\ taken\ = Time\ taken\ for\ 1\ survey\ in\ hours\times no.\ of\ survey](https://tex.z-dn.net/?f=Tota%5Cl%20time%5C%20taken%5C%20%3D%20Time%5C%20taken%5C%20for%5C%201%5C%20survey%5C%20in%5C%20hours%5Ctimes%20no.%5C%20of%5C%20survey)
![Total\ time\ taken\ =\frac{10}{60} \times 30 = 5 hours](https://tex.z-dn.net/?f=Total%5C%20time%5C%20taken%5C%20%3D%5Cfrac%7B10%7D%7B60%7D%20%5Ctimes%2030%20%3D%205%20hours)
5.
Andy played golf three times during his vacation. His scores were 92, 87, and 88.
Let A stands for the average.
![Average \ score=A= \frac{Score_1+Score_2+Score_3}{3} =\frac{92+87+88}{3}=89](https://tex.z-dn.net/?f=Average%20%5C%20score%3DA%3D%20%5Cfrac%7BScore_1%2BScore_2%2BScore_3%7D%7B3%7D%20%3D%5Cfrac%7B92%2B87%2B88%7D%7B3%7D%3D89)
6.
Tickets to a local basketball team’s games cost $12 each. Brendon and Ed each bought tickets to four games.
Total tickets = 2×4=8 (∵ They each bought 4 tickets)
(Let t stand for the amount spent on tickets.
![Amount\ spent\ on\ tickets\ =price\ of\ 1\ ticket \times total\ ticket}](https://tex.z-dn.net/?f=Amount%5C%20spent%5C%20on%5C%20tickets%5C%20%3Dprice%5C%20of%5C%201%5C%20ticket%20%5Ctimes%20total%5C%20ticket%7D%20)
![\Rightarrow t=12 \times 8=96](https://tex.z-dn.net/?f=%5CRightarrow%20t%3D12%20%5Ctimes%208%3D96)