Write the equation of the axis of symmetry.y = -6x2 - 8
A. x = 8
B. x = 
C. x = 0
D. x = -6
Answer: C
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Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of x2 should be positive or negative.The height of a ball thrown from the ground, as a function of time.
A. quadratic; positive B. linear; negative C. linear; positive D. quadratic; negative
Are these fractions equal?
and 
A. Yes B. No
Solve the problem.The diagonal d (from the lower back corner to the upper front corner) of a rectangular solid, like the one shown below, is given by d = 
A rectangular shipping crate has a diagonal of 26 inches. If the longest side of the crate is 4.0 times the shortest side, and the other side is 2.0 in. longer than the shortest side, find all measurements of the crate, to the nearest inch. 
x x + 2.0 4x
A. 10 in., 11 in., 40 in. B. 7 in., 9 in., 28 in. C. 10 in., 24 in., 26 in. D. 6 in., 8 in., 24 in.
Make the indicated conversion within metric units of mass.1.81 kilograms to grams
A. 1810 g B. 0.00181 g C. 0.0181 g D. 181 g