Find the coordinates of the vertex and the direction of opening of each parabola.y = (x + 2)2 + 8
A. (8, -2) opens downward
B. (8, -4) opens downward
C. (-8, 2) opens upward
D. (-2, 8) opens upward
Answer: D
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Find the logarithm.log10 0.1
A. 3 B. -3 C. -1 D. -2
Perform the indicated operation.11 gal 4 fl oz ÷ 2
A. 5 gal 10 fl oz B. 5 gal 1 qt 2 fl oz C. 5 gal 2 qt 2 fl oz D. 5 gal 3 qt 2 fl oz
Solve the variation problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If the force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 1 pound B. 3 pounds C. 4 pounds D. 2 pounds
Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.2.5x + 1.1y - 3.5z = 4.05.2x - 5.4y + 0.6z = -2.33.5x + 4.3y + 3.5z = 11.4
A. (2.3, 3.1, 0.4) B. (1.2, 1.6, 0.2) C. (4.6, 6.3, 0.7) D. (0.6, 0.8, 0.1)