Graph on the number line, and express in interval notation.The set of all real numbers less than 4.
A. [4, ?)
B. (-?, 4)
C. (4, ?)
D. (-?, 4]
Answer: B
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Find all the second order partial derivatives of the given function.f(x, y) = xye-y2
A. 
= ye-y2; 
= 2xye-y2(y2 - 1); 
= 
= e-y2(1 - y2)
B. 
= 0 ; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - y2)
C. 
= 0; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - 2y2)
D. 
= ye-y2; 
= 2xye-y2(2y2 - 6); 
= 
= e-y2(1 - 2y2)
Tell whether the points are the vertices of a parallelogram (that is not a rectangle), a rectangle, or neither.(-7, -1), (2, -10), (16, -3), (7, 8)
A. Rectangle B. Parallelogram C. Neither
Complete the statement using the required property of multiplication.Identity property: 1 ? 34 = _______
A. 34 B. 1 C. 35 D. 0
Solve the problem.Jim has gotten scores of 79 and 61 on his first two tests. What score must he get on his third test to keep an average of 75 or greater?
A. At least 84 B. At least 71.7 C. At least 85 D. At least 70