Solve and graph. Write the result in interval notation.8x ? 56
A. (7, ?)
B. (-?, 7]
C. [7, ?)
D. (-?, 7)
Answer: B
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Solve the system by the method of substitution.
A. 
B. 
C. 
D. 
E. no solution exists
Using the horizontal-line test, determine whether the function is one-to-one.f(x) = 
A. Yes B. No
Solve the problem.A company is constructing an open-top, square-based, rectangular metal tank that will have a volume of 
What dimensions yield the minimum surface area? Round to the nearest tenth, if necessary.
A. 4 ft by 4 ft by 2 ft B. 8.1 ft by 8.1 ft by 0.5 ft C. 3.2 ft by 3.2 ft by 3.2 ft D. 4.6 ft by 4.6 ft by 1.5 ft
Convert the polar equation to rectangular form. Identify the curve.? = 
A. y = - 
x2; a circle centered at (0, 0) with radius 1
B. y = 
x; a line with slope - 
and y-intercept 0
C. x2 + y2 = 1; a circle centered at (0, 0) with radius 1
D. y = - 
x; a line with slope - 
and y-intercept 0