Add or subtract. Then simplify. If a denominator has two or more factors (other than monomials), leave it in factored form. Express the answer using the denominator of the first fraction when applicable.
- 
A. 
B. 
C. 6
D. 
Answer: D
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Use the product-to-sum or sum-to-product identities to find an identity for the given expression.sin 13? - sin 7?
A. 2 cos 10? sin 3?
B. cos 10? sin 3?
C. -2 cos 10? cos 3?
D. -2 cos 5? sin 
?
Solve the equation. Express radicals in simplest form.(5z - 1)2 = 
A. {3, -1}
B. 
C. 
D. 
Graph the quadratic function. Determine the vertex, find the equation of the axis of symmetry, find any x- and y-intercepts, and state the domain and range in interval notation.f(x) = 3x2 - 12x + 8
A. vertex: (2, -4)
axis of symmetry: x = 2
x-intercepts: 
and 
y-intercept: 8
domain: (-?, ?); range: [-4, ?)
B. vertex: (-4, 2)
axis of symmetry: x = -4
x-intercepts: none; y-intercept: 
domain: (-?, ?); range: [2, ?)
C. vertex: (-2, -4)
axis of symmetry: x = -2
x-intercepts: 
and 
y-intercept: 8
domain: (-?, ?); range: [-4, ?)
D. vertex: (-3, -2)
axis of symmetry: x = -3
x-intercepts: -3 + 2
and -3 - 2
y-intercept: 
domain: (-?, ?); range: [-2, ?)
Match the graph of the rational function with its equation.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 