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g100num [7]
3 years ago
12

Nathan sells posters. He starts with $1,000 and buys 9 posters for $28 each. He sells 5 posters for $42 each. He says that he ha

s about $900 after selling the 5 posters. Is Nathan’s estimate reasonable? Nathan’s estimate is reasonable. He spent about $200 and earned about $100 so he should have about $100 less than he started with. Nathan’s estimate is reasonable. He spent about $300 and earned about $200 so he should have about $100 less than he started with. Nathan’s estimate is not reasonable. He spent about $200 and earned about $200 so he should have the same amount of money as he started with. Nathan’s estimate is not reasonable. He spent about $300 and earned about $200 so he should have about $100 more than he started with
Mathematics
1 answer:
AnnZ [28]3 years ago
8 0

Answer:

Nathan’s estimate is reasonable. He spent about $300 and earned about $200 so he should have about $100 less than he started with.

Step-by-step explanation:

Lets use round #s

He buys 10 posters at $30 each, so he spent 10*30 = 300

He sells 5 posters at $40 each, so he made 5*40 = 200

So he made 200 - 300 = -100, meaning he made 100 less than he started with. 100 less from 1000 is $900.

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(CO 3) On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches. Find the probabi
ololo11 [35]

Answer:

C. Probability is 0.90, which is inconsistent with the Empirical Rule.

Step-by-step explanation:

We have been given that on average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches.

First of all, we will find z-score corresponding to 87.5 and 107.5 respectively as:

z=\frac{x-\mu}{\sigma}

z=\frac{87.5-97.5}{6.1}

z=\frac{-10}{6.1}

z=-1.6393

z\approx-1.64

z=\frac{x-\mu}{\sigma}

z=\frac{107.5-97.5}{6.1}

z=\frac{10}{6.1}

z=1.6393

z\approx 1.64

Now, we need to find the probability P(-1.64.

Using property P(a, we will get:

P(-1.64

From normal distribution table, we will get:

P(-1.64

P(-1.64

P(-1.64

Since the probability is 0.90, which is inconsistent with the Empirical Rule, therefore, option C is the correct choice.

6 0
4 years ago
PLEASE HELP ME ASP! Brainlist and 25 points!
Bezzdna [24]

Answer:

Answer is in the explanation

Step-by-step explanation:

I don't know exactly word from word what your choices look like...

but I can describe per each box what happened in my own words:

First box:  They multiply first equation by 3 and the second equation by 2 to obtain the equations in that first box.

Second box: They subtracted the two equations in the first box to obtain 1x+0y=2 which means 1x=2 or x=2 (this is called solving a system by elimination

Third box: They used their first original equation (before the multiplication manipulation) and plug in the value they got for x which was 2 giving them 3(2)-2y=10

Fourth box: They simplified the equation 3(2)-2y=10 by performing the multiplication 3(2) giving them 6-2y=10

Fifth box:  They subtracted 6 on both sides giving them -2y=4

Sixth box:  They divided both sides by -2 giving them y=-2

I will summarize then what I wrote above:

1st box: Multiplication Property of Equality

2nd box: Elimination

3rd box: Substitution (plug in)

4th box: Simplifying

5th box:  Subtraction Property of Equality

6th box: Division Property of Equality

4 0
3 years ago
Name the intersection of lines a and c
emmainna [20.7K]
I think it is P because that is the intercecting point

3 0
4 years ago
Can someone help me please????
Ilia_Sergeevich [38]

Answer:


Step-by-step explanation:

trapezium area

A=a+b/2(h)

Whole: A=8+10/2(6)

A=54 cm

Hole: 5+7/2(3)

a=18

54cm-18cm= 36

area of shaded region is 36cm.

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3 years ago
PLEASE HELP ME!!!
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Stairs because they can’t possibly walk up the stairs cause then they’ll fall
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