Solve the problem.When twice a number is increased by 2, the result is 48 plus the number . Find the number.
A. 46
B. 
C. 47
D. 44
Answer: A
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Use the given encoding matrix A to solve the problem.Use the given message to construct the code matrix by assigning numbers to the letters and symbols. Use the numerical assignment a = 1, b = 2, . . . , z = 26, space = 30, period = 40, and apostrophe = 60.Message: CALL ME TOMORROW.Encoding matrix A =
A.
B.
C. 
D.
Solve the problem.Two recording devices are set 3800 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 200 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
A. 1889.44 feet B. 8016.23 feet C. 423.53 feet D. 1272.55 feet
Solve the problem.The table below shows the results of a consumer survey of annual incomes in 100 households. 
What is the probability that a household has an annual income between $15,000 and $44,999 inclusive?
A. 0.49 B. 0.48 C. 0.77 D. 0.28
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x3y-1)7
A. x21y7
B. 
C. 
D. 