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3 years ago

Determine whether the three points are the vertices of a right triangle.

Mathematics

1 answer:

Jobisdone [24]3 years ago

5 0

Yes I have graphed them and they form a 90 degree angle

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What value of n makes the equation true?

mote1985 [20]

Answer:

0.7

Step-by-step explanation:

you have to do the two step equation

8 0

4 years ago

5 times the difference of a number and 20 is the same as half the sum of 4 more than 4 times a number. Can someone change it int

Andre45 [30]

5(x-20)=1/2(4+{4x})
Hope This Help

5 0

3 years ago

The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviat

aleksley [76]

Answer:

4.5 hour and 2 hour

Step-by-step explanation:

Given: The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviation of two hours.

To Find: If each time was increased by one hour, what would be the new mean and standard deviation.

Solution:

let the total numbers entries of hours in survey be = $\text{N}$

each entry in survey be = $\text{x}_{i}$

mean of survey is = $\mu$ = $3.5$ $\text{hours}$

standard deviation is = $\sigma$ = $2$ $\text{hours}$

if each entry in survey is increased by one hour then,

each new entry in survey is = $\text{x}_{i}+1$

the new mean is $\mu_{new}$ = $\frac{\text{sum of all hours}}{total number of entries}$

$\frac{\text{x}_{1} +1+\text{x}_{2}+1 +....+\text{x}_{N}+1 }{N}$

$\frac{(\text{x}_{1} +\text{x}_{2} +....+\text{x}_{N})+\text{N}\times1 }{N}$

$\frac{(\text{x}_{1} +\text{x}_{2} +....+\text{x}_{N})}{N}$ + $\frac{\text{N}\times1 }{N}$

$\mu_{new}$ = $\mu$ + 1= $4.5$ $\text{hours}$

now,

standard deviation is $\sigma_{new}=$ $\sqrt{\sum_{1}^{N}\frac{(\text{x}_{inew}-\mu_{new})^{2}}{N}}$

$\text{x}_{inew}= \text{x}_{i}+1$

$\mu_{new}=\mu+1$

putting values,

$\sqrt{\sum_{1}^{N}\frac{(\text{x}_{i}+1-\mu-1)^{2}}{N}}$

$\sqrt{\sum_{1}^{N}\frac{(\text{x}_{i}-\mu)^{2}}{N}}$ = $\sigma$

$\sigma_{new}$ =2

new mean and standard deviation are $4.5$ and $2$ $\text{hours}$

5 0

3 years ago

Abigail and Mason are saving money to buy a CD that costs

maw [93]

Answer:

abigail

Step-by-step explanation:

abigail is correct because she has 30 dimes a dime is worth 30 cents and if 30 times ten equals 300 it would be 3 dollars so all together they have 6 dollars so now all they need is 3 dollars

I hope that made it easier for you good luck

6 0

3 years ago

What does 15=-3y+21x in slope intercept form

DENIUS [597]

<u>the slope would be 7</u> once you added 3y to both sides, and then subtracted the 15 from both sides and then divided all terms by 3

8 0

3 years ago