Solve.A plane flying with a tailwind flew at a speed of 500 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 500
y = 300
B. x + y = 300
y = 500
C. x + y = 500
x - y = 300
D. x + y = 300
x - y = 500
Answer: C
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Solve the absolute value inequality. Write the solution set using interval notation.|11x - 9| < -4
A. (-?, ?)
B. 
C. 
? 
D. ?
Solve.A box of cereal contains about 12 cups. A serving size is 
cup. About how many servings are in the box of cereal?
A. 
servings
B. 9 servings
C. 16 servings
D. 
servings
Solve the problem.In a chemistry class, 4 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. 3.0 L B. 4.0 L C. 2.0 L D. 1.0 L
Write an equivalent expression using radical notation and, if possible, simplify. Assume that even roots are of nonnegative quantities.(16x)5/2
A. 2
B. 1024
C. 32
D. 1024