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3 years ago

The segments shown below could form a triangle. 15 A O A. True B. False

Mathematics

2 answers:

netineya [11]3 years ago

7 0

Answer:

false

Step-by-step explanation:

Because every segment must be minor than the sum of the other two

Morgarella [4.7K]3 years ago

5 0

Answer:

False

Step-by-step explanation:

9 + 4 must be > 15

9+4 is < than 15

False

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3 years ago

DE is a midsegment of AABC . Find the value of x . B х 5 А

Ugo [173]

Answer:

x = 10

Step-by-step explanation:

DE is the midsegment joining the midpoints of BC and AC respectively.

Therefore, by the property of midsegment of a triangle,

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3 years ago

If the f(x) is translated 2 units up, what function represents the new graph?

matrenka [14]

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3 years ago

the mean of a set of numbers is 300. if each number in that set is increased by 5, what is the new mean of this new set of numbe

Vilka [71]

The new mean of set of new numbers is 305

Solution:

Given, The mean of a set of numbers is 300

Each number in that set is increased by 5,

We have to find what is the new mean of this new set of numbers

$\text { mean }=\frac{\text { sum of observations }}{\text { number of observations }}$

Now, let the number of observations be n and observations be $a_{1}, a_{2}, a_{3}, a_{4}, \ldots \ldots \ldots, a_{n}$

$\text { So, mean }=\frac{a_{1}+a_{2}+a_{3}+\cdots a_{n}}{n}$

$a_{1}+a_{2}+a_{3}+\ldots \ldots+a_{n}=m e a n \times n$

$a_{1}+a_{2}+a_{3}+\ldots . a_{n}=300 n$

Now, after each number is increased by 5

$\text { New numbers are }\left(a_{1}+5\right),\left(a_{2}+5\right), \ldots \ldots \ldots\left(a_{n}+5\right)$

$\text { And, new mean }=\frac{\text {sum of new observations}}{\text {number of observations}}$

$=\frac{\left(a_{1}+5\right)+\left(a_{2}+5\right)+\ldots \ldots+\left(a_{n}+5\right)}{n}$

$=\frac{\left(a_{1}+a_{2}+\cdots a_{n}\right)+(5+5+5+\cdots+5(n\text { times)) } }{n}$

$=\frac{300 n+5 n}{n}=\frac{305 n}{n}=305$

Hence, the new mean is 305

7 0

4 years ago