Amount paid by Mary for her computer is .
<u>Solution: </u>
Given that, Sam purchased a computer for .
Price of the printer that Mary purchased was the price that Sam paid.
Need to calculate amount Mary pay for her computer. Assuming that Mary purchased same computer that is purchased by Sam and store selling the computer have same rates for all customers .
So, amount Mary pay for computer = Amount Sam paid for computer =
Hence, amount paid by Mary for her computer is .
9514 1404 393
Answer:
n = 8
Step-by-step explanation:
"By inspection" is an appropriate method.
We are asked to compare the expressions
n·n
8·n
and find the value(s) of n that makes them equal. <em>By inspection</em>, we see that n=8 will make these expressions equal. We also know that both expressions will be zero when n=0.
__
More formally, we could write ...
n^2 = 8n . . . . the two formulas give the same value
n^2 -8n = 0 . . . . rearrange to standard form
n(n -8) = 0 . . . . . factor
Using the zero product rule, we know the solutions will be the values of n that make the factors zero. Those values are ...
n = 0 . . . . . makes the factor n = 0
n = 8 . . . . . makes the factor (n-8) = 0
Generally, we're not interested in "trivial" solutions (n=0), so the only value of n that is of interest is n = 8.
__
A lot of times, I find a graphing calculator to be a quick and easy way to find function argument values that make expressions equal.
