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2 years ago

Here are the grades ! Help me please

Mathematics

1 answer:

pychu [463]2 years ago

5 0

I think the answer is 2.07, I’m not positive so I’m really sorry if I’m wrong

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A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. Find the value that is –2 standard devi

Varvara68 [4.7K]

I believe it is 34% + 13.5% = 47.5%
0.475(8.3)=3.9425
45-3.9425=41.0575

5 0

2 years ago

-8=-(x+4) what is the answer

Tems11 [23]

Step 1: Flip the equation.
−
x
+
4
=
−
8
Step 2: Subtract 4 from both sides.
−
x
+
4
−
4
=
−
8
−
4
−
x
=
−
12
Step 3: Divide both sides by -1.
−
x
−
1
=
−
12
−
1
x
=
12
Answer:
x
=
12

5 0

2 years ago

A newspaper conducted a survey to find out how many high school students play video games.The two ways table below displays the

zepelin [54]

Answer:

Step-by-step explanation:

Given that

We are given the following:

1. Boys who do play video games = 1593

2. Boys who do not play video games = 858

3. Total boys = 2451

4. Girls who do play video games = 1361

5. Boys who do not play video games = 1635

6. Total Girls = 2996

7. Total number of candidates = Total boys + Total girls

=(2451 + 2996) = 5447

8. Total number of students, who play video games = 2954

9. Total number of students, who do not play video games = 2493

Percentage of boys who play video games:

$\dfrac{1593}{2451} \times 100 = 64.99\%$

So, option A is not correct.

Percentage of girls who play video games:

$\dfrac{1361}{2996} \times 100 = 45.43\%$

so option B is correct. The percentage is near about 45%,

Percentage of Total number of students, who do not play video games:

$\dfrac{2493}{5447} \times 100 = 45.77\%$

So, option C is not correct.

7 0

2 years ago

Which inequality is represented by this graph

sertanlavr [38]

The right answer is of option D.

 $x \geqslant 4$ 

In the given graph, X is greater than 4 and X equals to 4.

Hope it helps.....

Good luck on your assignment

4 0

2 years ago

Please help!!

Kryger [21]

Switch y=2x+7 to 2x-y=-7 then multiply that equation by 2 to cancel out the y's. that ends up as 4x-2y=-14 which then you get x=-24. then you substitute x into one of the original equations y= 2(-24)+7 which equals y=-41

5 0

2 years ago