Solve the problem by setting up and solving a system of two linear equations in two variables. Use either the elimination-by-addition or the substitution method to solve the system.Suppose that a certain motel rents double rooms at $34 per day and single rooms at $26 per day. If a total of 42 rooms was rented one day for $1,252, how many of single rooms were rented?
A. 27 rooms
B. 20 rooms
C. 22 rooms
D. 42 rooms.
E. none of these
Answer: C
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Provide an appropriate response.In oblique triangle ABC, find the area, given the indicated parts. Round to tenths. Side a = 12, side b = 13, and side c = 5.
Fill in the blank(s) with the appropriate word(s).
Find the proportion of observations of a standard normal distribution that are between the given z-scores.0.11 and 2.11
A. 0.4383 B. 0.4388 C. 0.9388 D. 0.4423
Use the Chain Rule to differentiate the function. You may need to apply the rule more than once.f(x) = 
A. f'(x) = 
(7x - (x2 - x + 7)5)3/4[7 - 5(x2 - x + 7)4]
B. f'(x) = 
(7x - (x2 - x + 7)5)-3/4[7 - 5(x2 - x + 7)4]
C. f'(x) = 
(7x - (x2 - x + 7)5)3/4[7 - 5(x2 - x + 7)4(2x - 1)]
D. f'(x) = 
(7x - (x2 - x + 7)5)-3/4[7 - 5(x2 - x + 7)4(2x - 1)]
Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.P(x) = -4x4 - 8x3 - 7x2 - 9x + 8
A. 0 or 2 positive; 1 or 3 negative B. 1 positive; 1 or 3 negative C. 1 positive; 2 negative D. 1 positive; 1 negative