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3 years ago

11

A student reads 3/5 of a book in 30 minutes how much of the book will be read if the student reads at the same speed for 40 minu

tes

1 answer:

erastova [34]3 years ago

7 0

Answer:

4/5 of the book in 40 mins

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4 years ago

Please help me solve this

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3 years ago

Solve for x. Make sure to show all your work. 21=3(x+6)

ziro4ka [17]

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3 years ago

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What is the expected number of times a 6 appears when a fair die is rolled 10 times?

vlada-n [284]

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4 years ago

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2/(a-7)(a+2)=4/(a+3)(a+2)

pochemuha

$\frac{2}{(a - 7)(a + 2)} = \frac{4}{(a + 3)(a + 2)}$

$\frac{2}{(a^{2} + 2a - 7a - 14)} = \frac{4}{(a^{2} + 2a + 3a + 6)}$

$\frac{2}{a^{2} - 5a - 14} = \frac{4}{a^{2} + 5a + 6}$

$2(a^{2} + 5a + 6) = 4(a^{2} - 5a - 14)$
$2(a^{2}) + 2(5a) + 2(6) = 4(a^{2}) - 4(5a) - 4(14)$
$2a^{2} + 10a + 12 = 4a^{2} - 20a - 56$
$2a^{2} - 2a^{2} + 10a + 12 = 4a^{2} - 2a^{2} - 20a - 56$
$10a + 20a + 12 = 2a^{2} - 20a + 20a - 56$
$30a + 12 + 56= 2a^{2} - 56 + 56$
$\frac{30a + 68}{2} = \frac{2a^{2}}{2}$
$15a + 34 = a^{2}$
$\sqrt{15a + 34} = a$

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3 years ago