Solve the problem.John owns a hotdog stand. He has found that his profit is represented by the equation 
with P being profits and x the number of hotdogs sold. How many hotdogs must he sell to earn the most profit?
A. 41 hotdogs
B. 20 hotdogs
C. 36 hotdogs
D. 37 hotdogs
Answer: C
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Solve the problem.The hydrogen ion concentration of a substance is about 8.7 × 10-7 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 6.5 B. -7.9 C. 6.1 D. 7.9
Factor.175x2 + 560xy + 448y2
A. (35x + 56y)(5x + 8y) B. 7(5x - 8y)(5x + 8y) C. 7(25x2 + 80xy + 64y) D. 7(5x + 8y)2
Solve. Remember to insert units when writing your answer.There are two trees in Raul's garden. One tree is 28 ft 6 in. tall. The other tree is 14 ft 10 in. tall. How much taller is the taller tree?
A. 42 ft 8 in. B. 14 ft 8 in. C. 13 ft 8 in. D. 14 ft 4 in.
Write the equation of the circle in standard form. Find the center and radius. Then sketch the graph.x2 + y2 + 6x - 4y - 3 = 0
A. (x - 3)2 + (y + 2)2 = 16
(h, k) = (3, -2), r = 4
B. (x + 3)2 + (y + 2)2 = 16
(h, k) = (-3, -2), r = 4
C. (x + 3)2 + (y - 2)2 = 16
(h, k) = (-3, 2), r = 4
D. (x - 3)2 + (y - 2)2 = 16
(h, k) = (3, 2), r = 4