Multiply by a fraction equivalent to 1 to build up the fraction to one with the denominator shown.- 
= 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use logarithmic differentiation to find the derivative of y.y = cos x
A. cos x
B. cos x
C. cos x
D. 
Mathematics
Solve the problem.
The graph models the average amount spent annually on entertainment per household in Country X from 1981 to 1987. (i) Find the slope of the line. (ii) Find a point-slope form for the line. (Answers may vary.)
A. Slope is 675; point-slope form is y = 675(x - 1982) + 1500. B. Slope is 825; point-slope form is y = 825(x - 1984) + 2850. C. Slope is 375; point-slope form is y = 375(x - 1982) + 1500. D. Slope is 525; point-slope form is y = 525(x - 1984) + 2850.
Mathematics
Write the number in trigonometric form. Let 0 ? ? < 2?.-4 + 4
i
A. 4
B. 8
C. 8
D. 4
Mathematics
Solve the equation.-7x - 10 = 5 - 3x
A. 
B. 
C. 
D. 
Mathematics