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2 years ago

What is the answer to 7/8 - 1/6

Mathematics

2 answers:

prisoha [69]2 years ago

8 0

Answer:

17/24

Step-by-step explanation:

lcm is 24

7/8=21/24

1/6=4/24

21/24-4/24=17/24

ivann1987 [24]2 years ago

8 0

Answer:

17/24 or 0.708

Step-by-step explanation:

1 8 16 24 32 40 48

1 6 12 18 24 30 36 42 48

24 is LCM

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Suppose you read online that children first count to 10 successfully when they are 32 months old, on average. You perform a hypo

creativ13 [48]

Answer:

$p_v =2*P(t_{(35)}$

Step-by-step explanation:

Assuming this info from R

hist(gifted$count)

## Min. 1st Qu. Median Mean 3rd Qu. Max.

## 21.00 28.00 31.00 30.69 34.25 39.00

## Sd

## [1] 4.314887

Data given and notation

$\bar X=30.69$ represent the mean

$s=4.3149$ represent the sample standard deviation

$n=36$ sample size

$\mu_o =32$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is different than 32, the system of hypothesis would be:

Null hypothesis: $\mu = 32$

Alternative hypothesis: $\mu \neq 32$

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{30.69-32}{\frac{4.3149}{\sqrt{36}}}=-1.822$

P-value

The first step is calculate the degrees of freedom, on this case:

$df=n-1=36-1=35$

Since is a two sided test the p value would be:

$p_v =2*P(t_{(35)}$

7 0

3 years ago

A.(2,1)

Alex17521 [72]

Answer:

D(6, 3)

Step-by-step explanation:

The diagonals of a rectangle bisect each other, so the midpoint of AC is the same as the midpoint of BD. This means ...

(A +C)/2 = (B +D)/2 . . . . the midpoints are the same

A +C = B +D . . . . . . . . . multiply by 2

D = A +C -B = (2+5-2, 1+5-3) . . . . . solve for D, substitute given coordinates

D = (6, 3)

4 0

3 years ago

Leap years are years in which February has 29 days instead of 28. The device of leap year was invented to keep the calendar in s

goldenfox [79]

Answer:

As you know, a year has around 365 + 1/4 days.

This means that in two years, we have:

365 + 356 + 1/4 + 1/4 = 730 + 1/2

and so on.

adding this up, when we have 4 years we have a full day extra, this is:

1460 + 1

When we divide 1461 by 4, we have 365 with a surpass of 1.

The rule used to keep the calendar in sync with this extra day is adding an extra day to each fourth year.

So each fourth year, we have an extra day in Februray (the Februray 29th), this is called a bisiest year.

The "math rule" used to know if a year is leap or not is:

if a year is not divisible by 4, then it is a common year

else if the year is not divisible by 100 then it is a leap year,

else if the year is not divisible by 400, then it is a common year

if not, the year is a leap year.

Where "year" represents the number of the year.

8 0

3 years ago

Solve the system of equations

Veseljchak [2.6K]

Answer:

Option c is right:

(-6 , 2)

Step-by-step explanation:

( -6 , 2)

7 0

3 years ago

What are solid shapes

insens350 [35]

Answer:formele solide sun obiectele care sunt tari dexemple piatra telefonul cubul ele sunt solide

Step-by-step explanaton:

7 0

3 years ago