Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 - 1
A. Vertex: (0, -1);
x-intercepts: none;
y-intercept: (0, -1)
B. Vertex: (0, -1);
x-intercepts: (-1, 0) and (1, 0);
y-intercept: (0, -1)
C. Vertex: (-1, 0);
x-intercept: (-1, 0);
y-intercept: (0, 1)
D. Vertex: (0, 1);
x-intercepts: none;
y-intercept: (0, 1)
Answer: B
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A. {4} B. {32} C. {- 32} D. {-4}
Solve the equation.r - 1 = 9
A. r = 8 B. r = -8 C. r = 0 D. r = 10
Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 
The triangles are similar. Find the missing length x and the missing angles A, B, C. 
A. x = 16 units; A = 94°; B = 36°; C = 50° B. x = 8 units; A = 94°; B = 36°; C = 50° C. x = 8 units; A = 50°; B = 36°; C = 94° D. x = 16 units; A = 36°; B = 94°; C = 50°