Without graphing, determine whether the graph of the quadratic function opens up or opens down.f(x) = - 
x2 + 4x - 7
A. opens down
B. opens up
Answer: A
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Find all angles in degrees that satisfy the equation. Round approximate answers to the nearest tenth of a degree.sin ? = 0.824
A. {
? = 55.5° + k360° or ? = 235.5° + k360°}
B. {
? = 55.5° + k360° or ? = 124.5° + k360°}
C. {
? = 34.5° + k360° or ? = 145.5° + k360°}
D. {
? = 34.5° + k360° or ? = 325.5° + k360°}
Perform the indicated operations.-2(3 - 6)
A. -6 B. -18 C. 6 D. -12
Find the coordinates of the vertex for the parabola defined by the given quadratic function.y + 9 = (x - 3)2
A. (3, - 9) B. (9, 3) C. (9, - 3) D. (- 3, - 9)
Determine whether the values in the table belong to an exponential function, a logarithmic function, a linear function, or a quadratic function.
A. linear B. logarithmic C. exponential D. quadratic