Simplify the expression, writing the answer as a single term without negative exponents.a-2 - b-2
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Replace the polar equation with an equivalent Cartesian equation.r2 + 2r2 sin ? cos ? = 324
A. x2 + y2 = 324 B. x + y = 18 C. x + y = ±18 D. x2 + 3y2 = 324
Mathematics
First, round the mixed numbers to the nearest whole number and estimate the answer. Then find the exact answer and write it in simplest form.38
- 25
A. 11
B. 13
C. 12
D. 12
Mathematics
Find the exact value of the expression.tan 345°
A. 
B. 2 + 
C. -2 - 
D. 
Mathematics
Graph the ellipse. Give the coordinates of the center, as well as the values of a and b.4x2 + 5y2 - 24x + 50y + 141 = 0
A. center (3, -5), a = 
, b = 2
B. center (-3, 5), a = 
, b = 2
C. center (-3, 5), a = 2, b = 
D. center (3, -5), a = 2, b = 
Mathematics