Solve the problem.In a chemistry class, 9 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.5 liters
B. 5.5 liters
C. 9 liters
D. 3.5 liters
Answer: A
Mathematics
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Write as a decimal.
A. 0.84 B. 0.74 C. 0.75 D. 0.64
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A charter flight charges a fare of $300 per person plus $6 per person for each unsold seat on the plane. If the plane holds 176 passengers and if x represents the number of unsold seats, find an expression for the total revenue received for the flight. (Hint: multiply the number of seats sold, 
by the price per ticket).
A. R(x) = (176 - x)(300 + 6) B. R(x) = x(300 + 6x) C. R(x) = (176 - x)(300 + 6x) D. R(x) = x(176 - x)
Mathematics
Solve the problem.Express the perimeter of the trapezoid as a single rational expression.
A. 
B. 
C. x + 9
D. 
Mathematics