Solve the problem.Martha can rake the leaves in her yard in 6 hr. Her brother can do the job in 2 hr. How long will it take them to do the job working together?
A. 
hr
B. 3 hr
C. 
hr
D. 1
hr
Answer: D
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Find the average value of the function over the given interval.f(x) = 
+ 2 on [-3, 3]
A. 
B. 
C. 7
D. 21
List the terms of the expression.6 - 6x - 7xy - 5
A. 6, -6x, -7, x, y, -5 B. 1, -6x, -7xy C. 6, -6x, -7xy, -5 D. -6x, -7xy
Solve.Each week a soft drink machine sells x cans of soda for $0.75/soda. The cost to the owner of the soda machine for each soda is $0.10. The weekly fixed cost for maintaining the soda machine is $25/week. Write an equation that relates the weekly profit, P, in dollars to the number of cans sold each week. Then use the equation to find the weekly profit when 92 cans of soda are sold in a week.
A. P = 0.75x - 25; $44.00 B. P = 0.75x + 25; $94.00 C. P = 0.65x + 25; $84.80 D. P = 0.65x - 25; $34.80
Simplify the radical expression. Indicate if the expression is not a real number.
A. 40 B. 10 C. Not a real number D. 9