The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 
A. y2 = 25 - 10x
B. x2 = 10y - 25
C. y2 = 10x - 25
D. x2 = 25 - 10y
Answer: A
Mathematics
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Use identities to simplify the expression.
+ sec w cos w
A. 1 B. csc2 w C. tan2 w D. sec2 w
Mathematics
Find y '.y = 
A. - 
- 2
B. - 
- 2
C. 
+ 2
D. 
+ 2
Mathematics
Find an equation of the line satisfying the following conditions.If possible, write the equation in slope-intercept form. Vertical, passing through (-6.28, -5.05)
A. x = -6.28 B. y = -5.05 C. y = -6.28 D. x = -5.05
Mathematics
Solve the system by elimination. If the system is inconsistent or has dependent equations, say so.-x + 2y = 69x - 2y = 26
A. {(5, 4)} B. {(-5, 4)} C. {(4, 5)} D. ?; inconsistent system
Mathematics