Multiply.(7 - 5i)(7 + 9i)
A. 94 - 28i
B. -45i2 + 28i + 49
C. 4 - 98i
D. 94 + 28i
Answer: D
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Is the function graphed one-to-one?
A. No B. Yes
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 3x2 - 3y2
A. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: ellipses 
C. Domain: all points in the xy-plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the first quadrant of the xy-plane; range: all real numbers; level curves: hyperbolas 
Read each combination value directly from Pascal's Triangle.
A. 90,720 B. 181,440 C. 1 D. 9
Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.tan 1°
A. 0.08 B. 1.62 C. 0.02 D. 1.56