Subtract and, if possible, simplify.- 
- 
A. - 1
B. 
C. 1
D. - 
Answer: A
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Tempco Electronics, a division of Tempco Toys, manufactures an electronic football game. An efficiency study showed that the rate at which the games are assembled by the average worker t hours after starting work at 8 a.m. is
?
units/hour. How many units can the average worker be expected to assemble in the first hour of the morning shift? Answers are rounded to the nearest whole unit.
?
A. 23 units
B. 29 units
C. 26 units
D. 25 units
E. 16 units
Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-?, -2); concave downward on (-2, ?); inflection point at (-2, 2) B. Concave upward on (-2, ?); concave downward on (?, -2); inflection point at (-2, 2) C. Concave upward on (-2, ?); concave downward on (-?, -2); no inflection points D. Concave upward on (-?, -2); concave downward on (-2, ?); no inflection points
Solve the system by elimination.2x2 - 4y2 = 164x2 + 2y2 = 72
A. (4, 2), (-4, 2), (4, -2), (-4, -2) B. (-4, -2), (-2, -4) C. (4, 2), (2, 4), (-4, -2), (-2, -4) D. (4, -2), (4, 2)
Decide whether the given number is a solution to the equation preceding it.p + 15 = 26; 11
A. No B. Yes