Solve the compound inequality and graph the solution set on a number line. Except for the empty set, express the solution set in interval notation.-31 ? -4x - 3 < -15
A. (3, 7]
B. (-?, 3] ? (7, ?)
C. [3, 7)
D. ?
Answer: A
You might also like to view...
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 0 B. -54 C. 1 D. 3
Solve the problem.The cost function for the manufacture of graphing calculators is given by 
where x is the number of graphing calculators manufactured. Using the appropriate domain, sketch the graph of the average cost 
to manufacture x graphing calculators. Find the absolute minimum on the graph of 
. What do the coordinates of the absolute minimum tell us?
-4.0px;" />
A. The absolute minimum is at (31,622.78, 31.11). This tells us that the average cost of a graphing calculator is minimized at $31.11 per calculator when approximately 31,623 are produced.
B. The absolute minimum is at (34,825.23, 29.32). This tells us that the average cost of a graphing calculator is minimized at $29.32 per calculator when approximately 34,825.23 are produced.
C. The absolute minimum is at (31,622.78, 29.32). This tells us that the average cost of a graphing calculator is minimized at 
per calculator when approximately 31,623 are produced.
D. There is no absolute maximum.
Use the discriminant to determine the number and type of solutions for the equation.x2 - 2x + 4 = 0
A. Two complex-number solutions B. One real-number solution C. Two real-number solutions
Find the zeros of the function. Give approximate solutions rounded to three decimal places when necessary.f(x) = x2 - 4x + 7
A. 2 ± 3.464 B. 2 ± 1.732 C. 2 ± 1.732i D. 2 ± 3.464i