Build a variable expression for the given phrase.The product of eight and three more than a number
A. 8 + 3 ? x
B. 8(x + 3)
C. 8 ? 3 + x
D. (8 + 3)x
Answer: B
Mathematics
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The function f is one-to-one. Find its inverse.f(x) = 4x + 8
A. f-1(x) = - 
B. f(x) = 
C. f-1(x) = 
D. f-1(x) = 
Mathematics
Evaluate.Let a = (cos ?)i + (sin ?)j , b = 
i + 
j. Find a + b.
A. i - j B. -i - j C. -i + j D. i + j
Mathematics
Solve the equation.
+ 3 = 11
A. {64} B. {2} C. {28} D. {16}
Mathematics
Solve the problem. Give the answer to the nearest thousandth if necessary.A boat travels 3 miles south and then 6 miles east. How far is the boat from its starting point? 
East --6 mi-->
A. 3.354 mi B. 6.708 mi C. 4.5 mi D. 22.5 mi
Mathematics