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3 years ago

What number should be added to get 10/77 to get 1 ?

Mathematics

1 answer:

harkovskaia [24]3 years ago

6 0

I think to add to the same number and it would be a whole number

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Sequence: 5, -15, -35,<br> -55,<br> Common Difference:

White raven [17]

Answer:

d = -20

Step-by-step explanation:

Simply subtract the 1st 2 numbers together:

d = 5 - (-15) = -20

4 0

3 years ago

Given a normal population which has a mean of 110 and a standard deviation of 5, find the probability that a random sample of 49

Mrac [35]

Answer:

0.9168

Step-by-step explanation:

From the data given:

Mean = 110

standard deviation = 5

Let consider a random sample n =49 which have a mean between 109 and 112.

The test statistics can be computed as:

$Z_1 = \dfrac{x- \bar x}{\dfrac{\sigma}{\sqrt{n}}}$

$Z_1 = \dfrac{109- 110}{\dfrac{5}{\sqrt{49}}}$

$Z_1= \dfrac{-1}{\dfrac{5}{7}}$

$Z_1$ = -1.4

$Z_2= \dfrac{x- \bar x}{\dfrac{\sigma}{\sqrt{n}}}$

$Z_2 = \dfrac{112- 110}{\dfrac{5}{\sqrt{49}}}$

$Z_2 = \dfrac{2}{\dfrac{5}{7}}$

$Z_2 =2.8$

Thus; P(109 < $\overline x$ < 112) = P( - 1.4 < Z < 2.8)

= P(Z < 2.8) - P( Z < -1.4)

= 0.9974 - 0.0806

= 0.9168

8 0

3 years ago

Each big square below represents one whole. What percent is represented by the shaded area?

Lelechka [254]

Answer:

Fraction 81/100

Decimal .81

Percent 81%

Step-by-step explanation:

There are total 10×10 = 100 squares in the picture and number of shaded squares = 100 - 19 = 81

Shaded area expressed as the fraction of the whole =

Shaded area in decimals of the whole =

Shaded area in percent of the whole = = 81%

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3 years ago

Given sec θ = -2/4, find tan θ. Please explain with the Pythagorean theorem.

STALIN [3.7K]

Answer:

Root 3

Step-by-step explanation:

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3 years ago