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Naya [18.7K]
3 years ago
12

Tan30°+cos30°÷tan30°×cos30°​

Mathematics
1 answer:
jonny [76]3 years ago
4 0

Answer:

{1/√3+1/2} ÷{1/√3× 1/2}

  • (2+√3)/2√3÷(1/2√3)
  • 2+√3+1 /2√3
  • (2+1 )+√3 /2√3
  • 3 +√3 /2√3
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Consider a bell-shaped symmetric distribution with mean of 16 and standard deviation of 1.5. Approximately what percentage of da
fredd [130]

Answer: 95.45 %

Step-by-step explanation:

Given : The distribution is bell shaped , then the distribution must be normal distribution.

Mean : \mu=\ 16

Standard deviation :\sigma= 1.5

The formula to calculate the z-score :-

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

For x = 13

z=\dfrac{13-16}{1.5}=-2

For x = 19

z=\dfrac{19-16}{1.5}=2

The p-value = P(-2

0.9772498-0.0227501=0.9544997\approx0.9545

In percent, 0.9545\times100=95.45\%

Hence, the percentage of data lie between 13 and 19 = 95.45 %

6 0
3 years ago
Tell if the decimal on the left is less or greater than the decimal on the right. Use < or > 5.43123 5.43013
jok3333 [9.3K]

Proceed left to right. The larger number will have a larger digit in the corresponding place.

Here, the differing digits are 1 and 0 in the thousandths place. The appropriate sign is ">"

... 5.43123 > 5.43013

5 0
3 years ago
Can you please help me
FromTheMoon [43]

Answer:

9

Step-by-step explanation:

most accurate answer if tax was added it would be about 10 added to the fee when u do the math so the answer is 9

7 0
2 years ago
Read 2 more answers
100 POINTS HELP ASAP Linear Combination
notka56 [123]

Answer:

1)   x=\dfrac12

2)   n = -3 \ \ \textsf{and} \ \ m = -4

3)  see below

4)  A:  0 = 1

Step-by-step explanation:

<u>Question 1</u>

15-0.5(4x-2)+4x=17

\implies 15-2x+1+4x=17

\implies 2x+16=17

\implies 2x=1

\implies x=\dfrac12

<u>Question 2</u>

\textsf{rearrange} \ n=m+1 :

\implies -m=-n+1

\textsf{add equations} \ -m=-n+1 \ \textsf{and} \ m=2n+2:\\

\implies0=n+3

\implies n=-3

\textsf{substitute} \ \ n=-3 \ \ \textsf{into} \ \ m=n-1:

\implies m=-3-1

\implies m=-4

<u>Question 3</u>

subtract the second equation from the first

divide both sides by -4

substitute found value for y into first equation

solve for x

<u>Question 4</u>

3j=k

k=3j+1

\textsf{rearrange} \ 3j=k :

\implies -k=-3j

\textsf{add equations}\  -k=-3j \ \ \textsf{and}\ \ k=3j+1:

\implies 0=1

Solution = A

6 0
2 years ago
Helpp pls it’s 25 points each
KonstantinChe [14]

Answer:

1.= 2.5

2.= is incorrect because there should not be more than one = sign

Step-by-step explanation:

4 0
3 years ago
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