3 years ago

You delete 12 out of 20 pictures on your digital camera. What percent of the pictures do you delete?

Mathematics

1 answer:

expeople1 [14]3 years ago

5 0

You deleted 60 percent

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A-5/a divided by 4/a

maria [59]

Answer:

$\frac{a-5}{4}$

Step-by-step explanation:

the given equation is

$\frac{a-5}{a} /\frac{4}{a}$

from the multiplication rules we know that

$\frac{a}{b}/\frac{c}{d}=\frac{a}{b}*\frac{d}{c}$

so for the given equation changing the sidn of division to multiplication

the equation becomes

$\frac{a-5}{a} * \frac{a}{4}$

a cancels out from both numerator and denominator

so it becomes

$\frac{a-5}{4}$

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Stephanie had a total of 80 pieces of $ 2 and $ 10 notes. After spending 2/5 of her $ 2 notes and 8 pieces of her $ 10 notes, sh

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Answer:

$440

Step-by-step explanation:

notes $2 - n

notes $10 - m

n + m = 80 ----------> m = 80 - n

1 - 2/5 = 3/5

$\frac{3}{5} * n = m - 8$

$\frac{3}{5} * n = 80 - n - 8 \\\\\frac{3}{5} * n + n = 72\\\\\frac{8}{5} * n = 72\\n = 45 \\m = 35\\$

45 * $2 + 35 * $10 = 90 + 350 = $440

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