Multiply.(0.8a + b)( 2.1a2 - 4.5b)
A. 1.68a3 + 2.1ab - 3.6a2b - 4.5b
B. 1.68a3 + 2.1a2 b2 - 3.6ab - 4.5b2
C. 1.68a3 + 2.1a2 b - 3.6ab - 4.5b2
D. 1.68a3 + 2.1a2 b - 4.5ab - 4.5b2
Answer: C
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Rationalize the equation, then use it to solve the problem.The time T in seconds required for a pendulum of length L feet to make one swing is given by 
How long is a pendulum (to nearest hundredth of a foot) if it makes one swing in 3 seconds? Use 3.14 for ?.
What will be an ideal response?
Subtract.38 - (-70)
A. 32 B. -32 C. -108 D. 108
Find the inverse of the function.f(x) = 6 - x
A. f-1(x) = x + 6
B. f-1(x) = x - 6
C. f-1(x) = 
D. f-1(x) = 6 - x
Graph the quadratic equation. Identify the vertex and the intercept points with their coordinates.y = x2 - 4
A. Vertex: (0, -4);
x-intercepts: none;
y-intercept: (0, -4)
B. Vertex: (0, -4);
x-intercepts: (-2, 0) and (2, 0);
y-intercept: (0, -4)
C. Vertex: (0, 4);
x-intercepts: none;
y-intercept: (0, 4)
D. Vertex: (-4, 0);
x-intercept: (-4, 0);
y-intercept: (0, 16)