Factor by grouping.xy + y + 2x + 2
A. (x + 2)(y + 1)
B. (x + 1)(y + 2)
C. (2x + 2)(y + 1)
D. (x + 1)(2y + 2)
Answer: B
Mathematics
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Solve the problem.Without using a calculator, find the geometric mean of 10 and 90.
A. 900 B. 100 C. 30 D. 50 E. 80
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Convert the given number to scientific notation.420
A. 4.2 × 101 B. 4.2 × 102 C. 4.2 × 10-2 D. 4.2 × 103
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Find the function value.Let f(x) = 
x. Find f(3).
A. 
B. 
C. 216
D. 
Mathematics
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.p(x) = -x2 - 2x - 5
A. 
Vertex (-1, 4)
x-int = (-3, 0), (1, 0);
y-int = (0, 3)
B. 
Vertex (1, 4)
x-int = (-1, 0), (3, 0);
y-int = (0, 3)
C. 
Vertex (-1, -4)
no x-intercepts;
y-int = (0, -5)
D. 
Vertex (1, -4)
no x-intercepts;
y-int = (0, -5)
Mathematics