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3 years ago

Match each percent expression to its simplified form.

Mathematics

2 answers:

antoniya [11.8K]3 years ago

7 0

Answer:

Step-by-step explanation:

a)11.25

b)68.6

c)27.9

d)43.56

yulyashka [42]3 years ago

4 0

Answer:

Step-by-step explanation:

1) 15% of 75 = (15/100) * 75 = 0.15*75 = 11.25

2) 7% of 980 = 0.07 * 980 = 68.6

3) 45%of 62 = 0.45 * 62 = 27.9

4) 22% of 198 = 0.22 * 198 = 43.56

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Find the mean and standard deviation for the set of data.

dem82 [27]

The mean and standard deviation for the set of data will be 16 and 5.87. Then the correct option is A.

<h3>What is a standard deviation?</h3>

It is the measure of the dispersion of statistical data. Dispersion is the extent to which the value is in a variation.

The set of data is given below.

16, 22, 8, 5, 20, 18, 14, 17, 24

The mean of the data set will be

μ = (16 + 22 + 8 + 5 + 20 + 18 + 14 + 17 + 24) / 9

μ = 144 / 9

μ = 16

Then the standard deviation of the data set will be

$\rm \sigma = \sqrt{\dfrac{\Sigma (x_i - \mu)^2}{n}} \\\sigma = \sqrt{\dfrac{(16 - 16)^2 +(22 - 16)^2 + (8-16)^2 + ......+(24-16)^2 }{9}} \\\sigma = \sqrt{\dfrac{310}{9}}\\$

Simplify the expression further, then we have

σ = √34.44

σ = 5.87

The mean and standard deviation for the set of data will be 16 and 5.87.

Then the correct option is A.

More about the standard deviation link is given below.

brainly.com/question/12402189

#SPJ1

3 0

1 year ago

Decide whether x=2 is a solution of x square+4x-12=0

hjlf

Answer:Yes, it is

Step-by-step explanation:

2^2+4(2)-12=0

4+8-12=0

12-12=0

0=0

7 0

3 years ago

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ohaa [14]

Answer:

The answer is C

3 0

2 years ago

Determine The number of solutions 3(x-4)=2x+6

Trava [24]

Answer:

The answer will be listed below.

Step-by-step explanation:

First of all, you want x to by itself, so distribute the three to both x and negative 4 so you'll get 3x-12=2x+6.

Now, subtract 2x from both sides and add 12 to both sides and you'll get an answer of x=19. From that, you are able conclude that this equation has one solution.

3 0

3 years ago

O is the centre of this circle and point Q is a point of tangency. Determine the value of t. If necessary, give your answer to t

dsp73

Answer:

Hello bozo

Step-by-step explanation:

4 0

2 years ago