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3 years ago

8

Pens cost $0.20 each. Pencils cost $0.15 each. Write an algebraic expression that represents the total cost of buying p pens and

n pencils. (Will give brainliest if correct)

1 answer:

Harlamova29_29 [7]3 years ago

8 0

Answer:

y=0.20p + 0.15n

Step-by-step explanation:

I believe this is correct I am 90% positive that it is right.

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If you divide any number by itself, what is the result? How can you apply this result to the expression -1×60/-1×10?

Alex73 [517]

Answer:

Step-by-step explanation:

Any number divided by itself is 1. In the expression-1 times -10 over -1 times -60 ,the -1s in the numerator and the denominator cancel each other out to give the result , or 6.

4 0

3 years ago

You are offered an item of $17.85 if the sellers states he normally sets the same item for $19.95 what percentage discount it he

nadezda [96]

Answer:

Discount percentage = 10.5% (Approx)

Therefore the discount is seller offering you is 10.5 % .

Step-by-step explanation:

Discount = Marked price - Selling price

As given

You are offered an item for $17.85. If the seller states he normally sells the same item for $19.95 .

Here

Marked price = $19.95

Selling price = $17.85

Discount = 19.95 - 17.85

= $2.1

$\frac{2.1 x 100}{19.95}$

$\frac{210}{19.95}$

Discount percentage = 10.5% (Approx)

Therefore the discount is seller offering you is 10.5 % .

6 0

2 years ago

Lisa has collected data to find that the number of pages per book on a book shelf has a normal distribution. What is the probabi

r-ruslan [8.4K]

Answer:

15.85%

Step-by-step explanation:

The empirical rule states that:

68% of all data falls within 1 standard deviation of the mean
95% of all data falls within 2 standard deviation of the mean
99.7% of all data falls within 3 standard deviation of the mean

When we say 1,2,3 standard deviation of the mean, that is, it is evenly distributed in both sides of the mean. For example:

68/2 = 34% of data falls within mean - 1*standard deviation, and

also, 34% of data falls within mean + 1*standard deviation

Now, we see that 192 - 27 = 165, so this is 1 standard deviation of the mean [mean - 1*standard deviation], so 34% of data fall in that range.

But we want, data that ARE FEWER than 165. So, we use property of normal distribution.

Half of data (50%) is left of mean, of which 34% fall within 1 standard deviation So the remaining would fall fewer than 165.

That is 50 - 34 = 16 - 0.15 = 15.85%

<u><em>Note:</em></u> since 99.7% fall within 3 standard deviation of mean, so 100 - 99.7 = 0.3 which is distributed in both sides, so 0.3/2=0.15 is subtracted

6 0

3 years ago

-4( -3 )+ (6-2)/64 = ?

Kisachek [45]

Answer:

12.0625

Step-by-step explanation:

Im not sure but im pretty sure it's correct

8 0

3 years ago

Read 2 more answers

PLEASE HELP ME! I will mark you as a BRAINLIST!!

disa [49]

The answer is -15

See the attached image for the steps on how I got that answer.

8 0

3 years ago