Graph the polar equation.r cos ? = -4
A. 
B. 
C. 
D. 
Answer: A
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Write a chain rule formula for the following derivative.
for u = f(p, q); p = g(x, y, z), q = h(x, y, z)
A. 
= 
+ 
+ 
B. 
= 
C. 
= 
+ 
D. 
= 
+ 
Solve the problem.Cruising magazine published 34 freelance articles last year. If freelance articles are 11% of the total articles, how many articles were published? Round to the nearest whole article.
A. 370 articles B. 309 articles C. 37 articles D. 31 articles
Translate the problem to a system of equations, then solve using Cramer's Rule.Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 500 gallons of gasohol containing 10% alcohol?
A. 208 gal 5%, 292 gal 12% B. 143 gal 5%, 357 gal 12% C. 357 gal 5%, 357 gal 12% D. 25 gal 5%, 60 gal 12%
Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. 
B. {(0, 5)}
C. {(5, 0)}
D. {(5, 1)}