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3 years ago

How much will Emily pay for the backpack after the discounts?

Mathematics

2 answers:

Vedmedyk [2.9K]3 years ago

7 0

Add 20 and 30 together. It makes 50% so that is half of 100. Half 60 then you get your answer. The answer ro the equation is 30.

Bas_tet [7]3 years ago

6 0

The backpack is 60.00 with a 20%+ a 30% discounts totalling 50 % off half of 60.00 equals 30

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Decimal to percentage

Lostsunrise [7]

To convert a decimal to a percent, multiply the decimal by 100, then add on the % symbol. An easy way to multiply a decimal by 100 is to move the decimal point two places to the right. This is done in the example below. Each decimal in Example 1 went out two places to the right of the decimal point.

5 0

3 years ago

Read 2 more answers

HURRY ILL GIVE BRAINLIEST AND THUMBS UP MUST BE THE RIGHT ANSWER

Katyanochek1 [597]

-14.

Hope this helps! If you feel I did not give enough information, feel free to ask for more clarification.

7 0

3 years ago

Chris types at an average speed of 45 words per minute. He has already typed 1,500 words of his final paper. The paper has to be

lana [24]

Answer:

C. 45x + 1,500 > 3,750

Step-by-step explanation:

You know he has already started on his paper with 1,500 words and he needs to have more words than 3,750 in his final paper which includes the 1,500. Thus, he would have 45x number of words remaining in his paper, according to his speed of 45 words per minute.

Remaining words + 1,500 words must be more than 3,750.

45x + 1,500 > 3,750

The > sign means that something on the left is more than something on the right.

6 0

3 years ago

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The sample loses 1/3of it’s mass every ___ days

eimsori [14]

Answer:

The sample loses $\frac{1}{3}$ of its mass every $\frac{1}{3}$ days.

Step-by-step explanation:

Expression that shows the relation between final mass of the element after 't' days is,

M(t) = $900(\frac{8}{27})^t$

If M(t) = two third of the initial mass [After the loss of one third of the initial mass remaining mass of the element = 1 - $\frac{1}{3}$ = $\frac{2}{3}$ rd of the initial mass]

$900\times \frac{2}{3}=900(\frac{8}{27})^t$

$\frac{2}{3}=(\frac{8}{27})^t$

$\frac{2}{3}=[(\frac{2}{3})^3]^t$

$(\frac{2}{3})^1=(\frac{2}{3})^{3t}$

By comparing powers on both the sides

3t = 1

t = $\frac{1}{3}$ day

Therefore, The sample loses $\frac{1}{3}$ of its mass every $\frac{1}{3}$ days.

5 0

3 years ago

Suppose 88% of all batteries from a supplier have acceptable voltages. A certain type of flashlight requires two D batteries, an

ira [324]

Answer:

0.3036 = 30.36% probability that at least 9 of the flashlights function properly.

Step-by-step explanation:

For each flashlight, there are only two possible outcomes. Either it works, or it does not. Flashlights are independent. This means that we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

Flashlight works correctly if both its batteries have acceptable voltages:

Each battery has an 88% = 0.88 probability of working correctly(having acceptable voltage), so the probability of the flashlight working correctly is given by:

$p = (0.88)^2 = 0.7744$