Each of 8 samples has a different standard deviation . how many of the 8 samples could be from the same population ?
a.5
b.7
c.8
d.6

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

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Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?