Write an algebraic expression for the quantity. Let x represent the unknown value.A value decreased by five.
A. 5 - x
B. x + 5
C. x - 5
D. 
Answer: C
Mathematics
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Solve the problem.The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with a mean of 4.0 minutes and a standard deviation of 1 minute. Find the probability that a randomly selected college student will take between 2.5 and 5.0 minutes to find a parking spot in the library lot.
A. 0.0919 B. 0.4938 C. 0.2255 D. 0.7745
Mathematics
Solve.If Gloria received a 7 percent raise and is now making $22,470 a year, what was her salary before the raise?
A. $21,470 B. $22,000 C. $20,470 D. $21,000
Mathematics
Verify that each equation is an identity.(sec ? + tan ?)2 = 
What will be an ideal response?
Mathematics
Simplify.24 + 26 ? 28
A. 78 B. 1400 C. 652 D. 752
Mathematics