Find the value of the function.f(x) = 7 - 3x2;
f(-6)
A. -101
B. 43
C. 115
D. 25
Answer: A
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Find the mean.Jill kept track of the number of hours she spent exercising each week. The results for four months are listed below. Find the mean number of hours Jill spent exercising per week. Round your answer to one decimal place if necessary. 6.7 7.4 7.5 8.6 7.3 6.7 8.7 7.5 8.2 6.7 8.6 8.3 8.8 7.4 7.4 8.2 7.3 8.7
A. 8.2 B. 7.8 C. 7.4 D. 8.0
Solve the problem. Find the exact value of x in the figure.
A. 9
B. 9
C. 9
D. 9
Solve.Suppose economists use as a model of a country's economy the equation C = 0.7050D + 5.9077where C represents the consumption of products in billions of dollars and D represents disposable income in billions of dollars. Solve the equation for D and use the result to determine the disposable income D if the consumption C is $8.02 billion. Round your answer to the nearest tenth of a billion.
A. $5.5 billion B. $2.9 billion C. $11.6 billion D. $3.0 billion
Solve the system of equations by elimination.
x + 
y = 
5x + 2y = 52
A. (-4, 12) B. (-12, 5) C. (-12, 4) D. (12, -4)