 |
| ||
| |||
|
| Math Central | Quandaries & Queries |
|
Question from Jora, a student: Electronic Store John opened an electronic store in December. During his first month, he sold 10 LCD TVs and 20 Plasma TVs. His income during that month was $12800. In January, he sold 25 LCD TVs and 40 Plasma TVs for an income of $27600. In February he projects to sell 30 LCD TVs and 50 Plasma TVs. If John expenses are $28900 in February, how much money will he have after paying the expenses? |
Hi Jora,
Suppose that an LCD TV sells for L dollars and a Plasma TV sells for P dollars. In December John's income was then
\[10 L + 20 P = 12800 \mbox{ dollars}\]
Write the equation for his income in in January. Solve the equations for L and P. What is John's expected income in February? After paying his expenses in February how much id he make in February?
Penny
| ||
| ||
| ||
 |
 |
|
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.