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ella [17]
3 years ago
5

BRAINLIESTT ASAP! PLEASE HELP ME :) Solve for x given that CE=36. Show your work.

Mathematics
1 answer:
grigory [225]3 years ago
6 0
<h3>Answer: x = 7</h3>

Explanation:

Segment addition postulate

CD+DE = CE

this basically is the idea of gluing smaller pieces together to get a larger structure. We can go in reverse to break up a large item into smaller bits. This is assuming there is no leftovers, overlaps, or parts wasted/lost.

CD = 9

DE = 3x+6

CE = 36

----

CD+DE = CE

9+3x+6 = 36

3x+15 = 36

3x = 36-15

3x = 21

x = 21/3

x = 7

-----

If x = 7, then

DE = 3x+6 = 3*7+6 = 21+6 = 27

and

CD+DE = 9+27 = 36 = CE

confirming our answer

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7. A triangle has sides with lengths of 10 metres,
Kay [80]

Answer:

It is not a right triangle.

Step-by-step explanation:

We can prove this by Pythagorean theorem because it represents to a right triangle.

Pythagorean theorem:

a² + b² = c²

Now substitute the values.

Note: the longest side will represent c

So,

a = 10 m

b = 16 m

c = 20 m

10² + 16² = 20²

The objective here is to make them equal.

100 + 256 = 400

356 ≠ 400

They are not equal so it is not considered a right triangle.

7 0
3 years ago
PLEASE HELP WITH QUESTIONS 11-14 ASAP!!!!!!!!
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Answer:

11) mean=2   12) median=2   13)range =4  

Step-by-step explanation:

11) the set is

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so add all these which will give you 30 and then divide that by how many numbers are there in the set which there are 15, so 30 divided 15 =2

12) arrange numbers from smallest to largest and the number exactly in the middle is the median

13)biggest number-smallest number

3 0
3 years ago
50 POINTS !!<br><br><br> PLEASE HELP AND EXPLAIN !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.
allochka39001 [22]
I need the point my point is -
4 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=15%20x%5E%7B2%7D%20%2B14x-49%3D0" id="TexFormula1" title="15 x^{2} +14x-49=0" alt="15 x^{2} +1
Alex777 [14]
15x^2+14x-49=0\\\\&#10;Terms:\\&#10;a=15\ \ \ \ b=14\ \ \ \ c=-49\\&#10;Quadratic\ Formula:\\\\&#10;x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\&#10;x=\dfrac{-14\pm\sqrt{196+2,940}}{30}\\\\&#10;x=\dfrac{-14\pm\sqrt{3,136}}{30}\\\\&#10;x=\dfrac{-14\pm56}{30}

Roots:\\\\&#10;x'=\dfrac{-14+56}{30}\\\\&#10;x'=\dfrac{42}{30}\\\\&#10;x'=\dfrac{21}{15}\\\\&#10;\boxed{x'=\dfrac{7}{5}}\\\\\\\\&#10;x''=\dfrac{-14-56}{30}\\\\&#10;x''=\dfrac{-70}{30}\\\\&#10;\boxed{x''=\dfrac{-7}{3}}
8 0
3 years ago
Read 2 more answers
3^x=1/9<br><br> What does x equal?
Nastasia [14]

Answer: The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!

Step-by-step explanation:

7 0
3 years ago
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