Add and subtract as indicated. Simplify and leave the numerator and denominator in your answer in factored form.
+ 
A. 
B. 
C. 
D. 
Answer: D
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How many subsets and proper subsets are in the given set?the set of words describing the colors on a stoplight
A. 16, 15 B. 8, 7 C. 7, 8 D. 15, 16
Convert the degree measure to radian measure. Use the value of ? found on a calculator and round as indicated.Round to the nearest hundredth of a radian.52°54'
A. 0.9 B. 0.89 C. 0.91 D. 0.92
Provide an appropriate response.Jamie used the Pythagorean theorem to find the length of the missing side of the triangle shown. 
He did the following calculations:x2 + 72 = 102?x2 = 102 - 72?x2 = 51?x = 
?x ? 7.1Why did Jamie not get the correct answer?
What will be an ideal response?
Knowing that the surface area of a sphere is given by 
, complete the proof of thevolume formula for the sphere. Having separated the sphere into n pyramids ( each with the center of the sphere for its vertex), show that the volume of the sphere is 
.
What will be an ideal response?