Simplify the expression, writing the answer as a single term without negative exponents.a-2 - b-2
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.The grading scale for a C in Amy's biology class is an average on tests between 70% and 80%, inclusive. Amy has 67%, 84%, and 77% on the first three tests this semester. What range of scores on the fourth test would give her a C?
A. Between 52% and 92%, inclusive B. 87% or better C. Between 70% and 80%, inclusive D. Between 57% and 87%, inclusive
Provide an appropriate response.Find the supplement of 140° 18' 37". Convert the result to its decimal equivalent and round to the nearest ten-thousandth.
Fill in the blank(s) with the appropriate word(s).
Find an equation of the line that passes through the points (2, 9) and (-1, -12).
What will be an ideal response?
Solve the equation.3x + 9 = 39
A. 31 B. 4 C. 10 D. 27