Find the axis of symmetry of the given function.y = 2x2 + 8x + 7

A. x = -1
B. x = 1
C. x = 2
D. x = -2


Answer: D

Mathematics

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Find two integers whose product is 77 such that one of the integers is three less than twice the other integer. 

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Mathematics

Use the factor theorem to determine if x - c is a factor of f(x). If so, use synthetic division to write f(x) in the form f(x) = x3 + 343; x + 7

A. (x + 7)(x2 - 7x + 49) B. (x + 7) is not a factor C. (x + 7)(x2 + 49) D. (x + 7)(x2 + 7x + 49)

Mathematics

Find the rate of change.The initial concentration of an enzyme is 5 moles (mol). Twenty seconds into the reaction, only 0.4 mol of the enzyme remains. Find the rate of change of the enzyme in mol/s.

A. 0.23 mol/s B. -4.35 mol/s C. -0.23 mol/s D. 4.35 mol/s

Mathematics

Solve the problem.Midtown Antiques collects 3% sales tax on all sales. If total sales including tax are $1034.87, find the portion that is the tax. Round to the nearest cent if necessary.

A. $30.14 B. $31.05 C. $20.14 D. $1004.73

Mathematics