Provide an appropriate response.A student is solving the equation x2 = 4x This student has decided to divide both sides of the equation by x and finds the solution x = 4. The student checks the answer in the back of the book and finds that x = 0 is also a solution. The student feels that this is a misprint. How would you advise him or her?
What will be an ideal response?
Order of operations x2 - 4x = x(x - 4) ? x = 0, x = 4 are solutions.
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Use identities to write each expression as a function of ?.cos (? + 90°)
A. cos ? B. -sin ? C. -cos ? D. sin ?
Solve the problem.Mara can type 2565 words in 
hour (45 minutes). How many words per minute can she type?
A. 1924 words/minute B. 57 words/minute C. 43 words/minute D. 76 words/minute
Round the whole number to the given place.In 2005, a company spent $493,749,725 on television advertising. Round this amount to the nearest hundred-million.
A. $400,000,000 B. $500,000,000 C. $493,700,000 D. $493,800,000
Solve.A faucet is used to add water to a large bottle that already contained some water. After it has been filling for 3 seconds, the gauge on the bottle indicates that it contains 8 ounces of water. After it has been filling for 10 seconds, the gauge indicates the bottle contains 22 ounces of water. Let y be the amount of water in the bottle x seconds after the faucet was turned on. Write a linear equation that relates the amount of water in the bottle,y, to the time x.
A. y = 2x + 12
B. y = 2x + 2
C. y = -2x + 14
D. y = 
x + 