Find the cross-product and determine whether the proportion is true or false.
= 
A. 1590 ? 252; false
B. 630 = 630; true
C. 960 = 960; true
D. 630 ? 960; false
Answer: D
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Simplify the expression.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Determine the values of x for which the function is differentiable.y = 
A. All real numbers except -3 B. All real numbers except 3 C. All real numbers D. All real numbers except 7
Use transformations to graph the function. Determine the domain, range, and the equation of the horizontal asymptote of the function.f(x) = -2(x + 3) + 4
A. domain: (-?, ?); range: (-?, -4);
horizontal asymptote: y = -4 
B. domain: (-?, ?); range: (-?, -4);
horizontal asymptote: y = -4
C. domain: (-?, ?); range: (-4, ?);
horizontal asymptote: y = 4
D. domain: (-?, ?); range: (-?, 4);
horizontal asymptote: y = 4
Identify the graph of the equation as a parabola, hyperbola, ellipse, or circle.y2 = 50 - x2
A. hyperbola B. parabola C. ellipse D. circle