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Kruka [31]
3 years ago
12

Help plz:)))I’ll mark u Brainliest

Mathematics
2 answers:
Stolb23 [73]3 years ago
8 0

Answer:

x=20

Step-by-step explanation:

hope this helps

jarptica [38.1K]3 years ago
5 0

Answer:

X=20

Step-by-step explanation:

enjoy! (Hope u got it right)

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A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of
hichkok12 [17]

Answer:

0.3745

Step-by-step explanation:

Data

mean (\mu): 80

standard deviation (\sigma): 4

Normal distribution table is in figure attached .

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

Z = (85 - 80)/4 = 1.25

Area below curve = 0.3944

Z = (82 - 80)/4 = 0.5

Area below curve = 0.0199

Proportion of exam scores between 82 and 85?

0.3944 - 0.0199 = 0.3745

5 0
3 years ago
Read 2 more answers
Four more than a number is more than thirteen write inequality
aniked [119]
4 more than a number = x + 4
is more than = >
thirteen = 13
x + 4 > 13
7 0
3 years ago
Consider the series 3/2 + 3/4 + 3/8 + 3/16 + ... What expression defines Sn?
snow_lady [41]

For the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula  3(\dfrac{1}{2})^n.

<h3>What is number series?</h3>

When the numbers are arranged in a series with some logic then it is called as the number series.

here we have a series:

\dfrac{3}{2}+\dfrac{3}{4}+\dfrac{3}{8}+\dfrac{3}{16}+............

The sum of the series will be given as:

S_n=3(\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{8}+\dfrac{1}{16}+............)

S_n=3 (\dfrac{1}{2})^n

Hence for the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula  3(\dfrac{1}{2})^n

To know more about number series follow

brainly.com/question/6561461

#SPJ1

5 0
2 years ago
Solve A=1/2(b+c)h for h . Please show work
Tju [1.3M]

h = \frac{2A}{b + c}

multiply both sides by 2 to eliminate the fraction

2A = ( b + c)h

isolate h by dividing both sides by (b + c)

h = \frac{2A}{b + c}



7 0
3 years ago
What is the area of the lateral surface of the following cylinder? 175.84 in. 2 28 in. 2 87.92 in. 2 43.96 in. 2
dem82 [27]

Answer:

87.92in.2

Step-by-step explanation:

7 0
3 years ago
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