Find a rectangular equation for the plane curve defined by the parametric equations.x = 5 cos t, y = -2 sin t; 0 ? t ? 2?
A. 4x2 - 25y2 = 100; x ? 5
B. 4x2 + 25y2 = 1; - 
? x ? 
C. 4x2 - 25y2 = 1; x ? 
D. 4x2 + 25y2 = 100; -5 ? x ? 5
Answer: D
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. (-2)2(-2)3
A. -64
B. -32
C. 
D. 
Use inductive reasoning to predict the next line in the pattern. Then perform the arithmetic to determine whether your conjecture is correct.8 × 9 = 10 × 11 - (8 + 9 + 10 + 11)9 × 10 = 11 × 12 - (9 + 10 + 11 + 12)
A. 10 × 11 = 12 × 13 - (10 + 11 + 12 + 13) B. 10 × 11 = 12 × 13 - (8 + 9 + 10 + 11 + 12 + 13) C. 11 × 12 = 13 × 14 - (10 + 9 + 8 + 7) D. 11 × 12 = 13 × 14 - (11 + 12 + 13 + 14)
Translate the sentence to an equation using x as the variable. Do not solve the equation.Dividing 28 by a number amounts to 7.
A. 28x = 7 B. 28 ÷ x = 7 C. 28 - x = 7 D. x ÷ 28 = 7
What term of the arithmetic sequence is the given number?805, 785, 765, . . . ; -515
A. 66 B. 64 C. 67 D. 63