Find the absolute value.
?
Fill in the blank(s) with the appropriate word(s).
Answer: 5
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Write the fraction in simplest form using the method of your choice.
A. 
B. 
C. 
D. 
Solve.An engineer uses the expression 
to describe the width of a rectangular steel plate she is designing for a machine. The expression 
describes the length. Write a rational expression for the perimeter of the steel plate.
A. 
B. 
+ 
C. 
+ 
D. 
+ 
Find the standard deviation.Lisa is currently taking an astronomy class. The instructor often gives quizzes. On the past seven quizzes, Lisa earned 47, 18, 36, 29, 15, 42, and 77. Find the standard deviation. Round your answer to one decimal place.
A. 36 B. 9,956.6 C. 12,588 D. 20.9
Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.-79
A. real B. irrational, real C. whole, real D. integer, rational, real