Add or subtract as indicated.-8.4 + (-7.5)

A. 15.9
B. -0.9
C. 0.9
D. -15.9


Answer: D

Mathematics

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Construct a truth table to determine when the lightbulb is on. That is, determine which switches must be open and which switches must be closed for the lightbulb to be on. 

A. The lightbulb will never be on.


B. The lightbulb will be on when p is open and q is closed.


C. The lightbulb will be on when p and q are both closed, or when p is closed and q is open.


D. The lightbulb will be on in all cases.


Mathematics

Find an equation of the hyperbola with vertices (0,±6) and asymptotes

What will be an ideal response?

Mathematics

Sketch the graph of the function. Describe how the graph can be obtained from the graph of a basic exponential function.f(x) = 2 ? 4(x - 1) + 4

A. Shift y = 4x right 1 unit(s), stretch it
vertically, and shift it up 4 unit(s)

B. Shift y = 4x right 1 unit(s), stretch it
vertically, reflect across the x-axis, and
shift it up 4 unit(s)

C. Shift y = 4x left 1 unit(s), stretch it
vertically, reflect across the x-axis and
shift it up 4 unit(s)

D. Shift y = 4x left 1 unit(s), stretch it
vertically, and shift it up 4 unit(s)

Mathematics

Factor the expression, if the trinomial is a perfect square. If it is not a perfect square, write "not a perfect square."9x2 - 12xy + 4y2

A. (3x - 2y)(3x + 2y) B. not a perfect square C. (3x + 2y)2 D. (3x - 2y)2

Mathematics