Find the exact value of the composition.tan-1 
A. 
B. - 
C. 
D. - 
Answer: B
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Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.Doreen and Irena plan to leave their houses at the same time, roller blade towards each other, and meet for lunch after 2 hours on the road. Doreen can maintain a speed of 7.7 miles per hour, which is 70% of Irena's speed. If they meet exactly as planned, what is the distance between their houses?
A. 15.4 mi B. 26.18 mi C. 22 mi D. 37.4 mi
Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 45 staff members and needs at least 30 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?
A. 35 counselors and 10 aides B. 18 counselors and 12 aides C. 27 counselors and 18 aides D. 12 counselors and 18 aides
Graph the function. State whether it is increasing, decreasing, or constant..F(x) = 1
A. constant
B. constant
C. constant
D. decreasing
Identify the equation without completing the square.2x2 + 4y2 - 3x - 1 = 0
A. parabola B. ellipse C. hyperbola D. not a conic