Solve the inequality graphically, numerically, or symbolically, and express the solution in interval notation. Where appropriate, round to the nearest tenth. ?r + 6? < 2
A. (4, 8)
B. (-8, -4)
C. (-?, 4) ? (8, ?)
D. (-?, -8) ? (-4, ?)
Answer: B
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Combine like terms.5ab + 9a + 15 + 4ab
A. 18a2b + 15 B. 18a + 9b + 15 C. 18ab + 15 D. 9ab + 9a + 15
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 35 staff members and needs at least 20 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. 8 counselors and 12 aides B. 13 counselors and 17 aides C. 13 counselors and 16 aides D. 19 counselors and 23 aides
Write and solve an equation to find the percent increase or decrease. Round your answer to the nearest tenth of a percent, if necessary.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 37 questions correct. What was the percent of increase?
A. 12% B. 32.4% C. 52% D. 48%
Solve the problem.The recipe for a chocolate chip cake calls for 
pound of chocolate chips. If a bakery wants to make 20 cakes, how many pounds of chocolate chips will they need?
A. 20 pounds B. 5 pounds C. 16 pounds D. 4 pounds