Replace the polar equation with an equivalent Cartesian equation.r cos ? = 9
A. y = 9
B. x = 9
C. 9y = 1
D. 9x = 1
Answer: B
Mathematics
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Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x| + 4 ? 14
A. (-?, -10] ? [10, ?)
B. [10, ?)
C. [-10, 10]
D. [18, ?)
Mathematics
Find the maximum y-value on the graph of y = f(x).f(x) = -x2 + 4x + 3
A. -7 B. -3 C. 3 D. 7
Mathematics
Write an equation for the sphere with the given point as its center and the given number as its radius.(7, 5, 2), 5
A. (x + 7)2 + (y + 5)2 + (z + 2)2 = 25 B. (x - 7)2 + (y - 5)2 + (z - 2)2 = 5 C. (x + 7)2 + (y + 5)2 + (z + 2)2 = 5 D. (x - 7)2 + (y - 5)2 + (z - 2)2 = 25
Mathematics
Multiply. Assume all variables represent nonnegative real numbers.
? 
A. 2
B. x
C. 
D. 2x
Mathematics