Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.
A. 7x - 3, x ? 5
B. 7x2 - 41, no restrictions on x
C. 
, x ? 5
D. 
, x ? 5
Answer: A
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Estimate by rounding.52,684 ÷ 474
A. 100 B. 90 C. 1000 D. 900
Refer to right triangle ABC with 
. Solve for all the missing parts using the given information.
?
?
, 
m
?
Apply the rules regarding the use of significant digits when determining your answer.
?
__________
?
__________ m
?
__________ m
What will be an ideal response?
Write the compound inequality as an absolute value inequality. Do not simplify.-0.8 < 2x + 3 < 0.8
A. 2x + 3 < 
B. 
> 0.8
C. 
< 0.8
D. -0.8 < 
< 0.8
Use a proportion to solve the problem.A quality-control inspector examined 210 calculators and found 11 of them to be defective. At this rate, how many defective calculators will there be in a batch of 15,960 calculators?
A. 76 calculators B. 2310 calculators C. 7 calculators D. 836 calculators