In mrs.chapmans math class, 2/3 of the students got either an A or a B on the last test. Of these students, 2/5 got a B. What fraction of the class got a B on the last test?
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OpenStudy (anonymous):
your first job it to find two fifths of two thirds, i.e. \(\frac{2}{3}\times \frac{2}{5}\)
OpenStudy (anonymous):
that equals 4/15
OpenStudy (anonymous):
actually that is your last job too, because that is all it asks for
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
really
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OpenStudy (anonymous):
well thank you
OpenStudy (anonymous):
yeah really
yw
OpenStudy (anonymous):
i gave you a medal
OpenStudy (anonymous):
thank you so much
OpenStudy (anonymous):
thanks !
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OpenStudy (anonymous):
can u please help me with another question
OpenStudy (anonymous):
sure
OpenStudy (anonymous):
Queisha spent 1/3 hour answering 9 homework questions for her history class. She spent the same amount of time on each question. What fraction of an hour did it take Queisha to answer each question?
OpenStudy (anonymous):
one ninth of one third
i.e. \(\frac{1}{3}\times \frac{1}{9}\)
she is a fast worker
OpenStudy (anonymous):
so 1/9 x 1/3
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
oh ok
OpenStudy (anonymous):
one more qick question
OpenStudy (anonymous):
*quick
OpenStudy (anonymous):
kk
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OpenStudy (anonymous):
do all squares have two pairs of parallel sides and do all rectangles have four congruent sides
OpenStudy (anonymous):
the answer to the first question is yes, a square has two pairs of parallel sides |dw:1397958190605:dw|
OpenStudy (anonymous):
but how
OpenStudy (anonymous):
"congruent" means equal length, so the answer to the second question is no, since the sides are not necessarily equal
OpenStudy (anonymous):
why are they parallel?
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OpenStudy (anonymous):
yeah
OpenStudy (anonymous):
they are parallel because each angle is a right angle