Replace the polar equation with an equivalent Cartesian equation. 9r cos ? + 2r sin ? = 1
A. 9y + 2x = 1
B. 9x + 2y = 1
C. 9x + 2y = x2 + y2
D. 
+ 
= 1
Answer: B
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in the first quadrant about the y-axis.
A. 64? B. 8?3 C. 8? D. 4?
Find the mean, median, and mode for the given data set.7, 5, 3, 9, 11, 7, 7, 5, 9, 11, 7, 3, 12, 9, 7, 7, 3, 5, 9, 7
A. Mean = 7.15, median = 9, mode = 7 B. Mean = 7.15, median = 7, mode = 7 C. Mean = 7.15, median = 7, mode = 12 D. Mean = 7.65, median = 7, mode = 12
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A. log 5 625 + 5 log 5 x + 5 log 5 y - 5 log 5 z
B. 4 + 5 log 5 x + 5 log 5 y - 5 log 5 z
C. 20 log 5 
D. 625 + 5 log 5 x + 5 log 5 y - 5 log 5 z
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -4, subtracted from the sum of 19 and eight times the number.
A. 4x - 27 B. 4x - (19 + 8x); -4x - 19 C. (19 + 8x) - (-4)x; 19 + 12x D. (19 + 8x) + (-4)x; 19 + 4x