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 = 100; -5 ? x ? 5
D. 4x2 - 25y2 = 1; x ? 
Answer: C
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For the following data table, complete the table of changes, and determine if the data can be modeled exactly by a linear function. Round your answer to two decimal places, if necessary. x 4 9 14 19 y 14.22 27.97 41.72 55.47? Change in x From 4 to 9 From 9 to 14 From 14 to 19 Change in ?y
What will be an ideal response?
Decide whether the equation is "conditional," an "identity," or a "contradiction." Give its solution set.3(40t + 20) = 12(5t + 50)
A. Identity; {9} B. Contradiction; {-11} C. Conditional; {9} D. Conditional; {-11}
Write the number as the sum of two primes. There may be more than one way to do this.44
A. 3 + 41, 7 + 37, 13 + 31 B. 3 + 41, 7 + 37, 11 + 33 C. 3 + 41, 5 + 39, 13 + 31 D. 22 + 22
Solve for y or k, as appropriate.100e4k = 500
A. ln 
B. 
C. 
D. 