The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 
A. y2 = 25 - 10x
B. x2 = 25 - 10y
C. x2 = 10y - 25
D. y2 = 10x - 25
Answer: A
Mathematics
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The function f(x) changes value when x changes from x0 to x0 + dx. Find the approximation error 
. Round your answer, if appropriate.f(x) = 
, x0 = 4, dx = 0.7
A. 0.08838 B. 0.00629 C. 0.11554 D. 0.00464
Mathematics
Simplify the expression.x - [9x - (x - 4)]
A. -7x - 4 B. -7x + 4 C. -4x + 4 D. -9x - 4
Mathematics
State whether the line between the two points is increasing, decreasing, horizontal, or vertical.(-11.89, 13.92) and (-8.02, -21.05)
A. increasing B. decreasing C. horizontal D. vertical
Mathematics
Find the following using a calculator. Round to four decimal places.log (-6)
A. 1.9459 B. 1.7918 C. 5 D. Does not exist
Mathematics