Answer:
21. d. 39
22. c. 20; 7
Step-by-step explanation:
21. This is straightforward evaluation of the function. Put the numbers 8 and -5 where x is in the function definition and do the arithmetic. Then find the difference of the results.
f(8) = 3·8 -2 = 22
f(-5) = 3·(-5) -2 = -17
f(8) - f(-5) = 22 - (-17) = 22 +17 = 39
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22. The first part is similar to 21—evaluate the function for x=2.
f(2) = 24 -2·2 = 24 -4
f(2) = 20
Note that this result is sufficient to allow you to choose the correct answer.
However, we can also do the second part. Find x for f(x) = 10
f(x) = 24 -2x
10 = 24 - 2x . . . . . . substitute 10 for f(x)
-14 = -2x . . . . . . . . . subtract 24 from both sides
7 = x . . . . . . . . . . . . . divide both sides by -2
<em>3 is the only number which is one less than a square...</em>
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Answer:
Im a little confused as to what the question is
Step-by-step explanation:
I believe that maybe your question was, "how much money is the lunches at the school?" if so.. I can help.
If he spent $15 for 5 days, and we are assuming he had lunch every day....
$15 divided by 5 equals $3.
The school lunches are $3.
Answer: The maximum numbers of rose bushes in garden is 16.
Explanation:
It is given that for every 18 mums she plants 12 tulips and for every 9 tulips there are 2 rose bushes.
Let the mums, tulips and roses are defined by M, T and R respectively.
From the given information,
Since it is given that 
, we get,
From the above equation 110 mums we need 16.3 roses. So, the number mums exceeds 110 if the roses are 17.
Therefore, the maximum numbers of rose bushes in garden is 16 for which the number of mums cannot exceed 110.
