Add or subtract by first simplifying each radical and then combining any like radical terms. Assume that all variables represent positive real numbers.5
+ 
A. 15
B. 6
C. 8
D. 5
+ 
Answer: C
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Use the given functions to find the requested function.f(x) = 4x + 8, g(x) = 3x2Find (fg)(x).
A. 3x2 + 4x + 8 B. 12x + 24 C. 12x2 + 24x D. 12x3+ 24x2
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 47.35 sin x. Make a scatter diagram of the data. Find the sinusoidal function of the form 
which fits the data.
What will be an ideal response?
Graph using the x- and y-intercepts.y = -4x + 7
A. 
B. 
C. 
D. 
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400