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cupoosta [38]
3 years ago
15

Please help D+E= 2 D-E=4 ​

Mathematics
2 answers:
Ghella [55]3 years ago
4 0

Answer:

e=-1, d=3

Step-by-step explanation:

d-e=4

d=4+e

plug this in to top equation

4+e+e=2

2e=-2

e=-1

plug in to bottom equation

d+1=4

d=3

NARA [144]3 years ago
3 0

Answer:

A

Step-by-step explanation:

That is the only pair that works

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Jody has $40 and needs at least $18.25 to buy the scrapbook. Each sheet of paper costs $0.34. how many sheets of paper can she b
photoshop1234 [79]
<h3><u>Question:</u></h3>

Jody is buying a scrap book and designed paper she has 40 dollars and needs at least 18.25 to buy a scrap book each seet of paper cost 0.34 how may sheets of paper can she buy

<h3><u>Answer:</u></h3>

Jody can buy 63 sheets of paper

<h3><u>Solution:</u></h3>

Jody has 40 dollars

Thus, she can spend less than or equal to 40 dollars

She needs at least 18.25 to buy a scrap book

Each seet of paper cost 0.34

Let "s" be the number of sheets of paper

Then,

18.25+0.34s\leq 40\\\\Subtract\ 18.25\ from\ both\ sides\\\\0.34s \leq 40-18.25\\\\0.34s\leq 21.75\\\\Divide\ both\ sides\ by\ 0.34\\\\s\leq 63.9

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4 0
3 years ago
Which sentence correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14
denis-greek [22]

Answer:

Option (c) is correct.

68% of the data points lie between 10 and 18.

Step-by-step explanation:

Given :  a normal distribution with a standard deviation of 4 and a mean of 14

We have to choose the  sentence that correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14.

Since, given 68% data.

We know mean of data lies in middle.

And standard deviation is distribute equally about the mean that is 50% of values less than the mean  and 50% greater than the mean.

So, 68% of data lies

mean - standard deviation = 14 - 4 = 10

mean + standard deviation = 14 + 4 = 18

So, 68% of the data points lie between 10 and 18.

4 0
3 years ago
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