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Afina-wow [57]
3 years ago
11

Three random question!

Mathematics
2 answers:
Olenka [21]3 years ago
8 0

Answer:

say what? hmmmm

Why does birds chirp?

Why are rabbits made to look cute?

How do I possibly read Anne Frank in one day?

Step-by-step explanation:

PIT_PIT [208]3 years ago
7 0

Answer:

If the world is unfair to everybody isn't it still fair.

Step-by-step explanation:

ok ummm....

Why is Donald Trump president.

Why am I on brainly instead of doing my school work.

And, why are my socks not matching.

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mr. cuddy draws a triangle with a perimeter of 36cm. Principal Aranda says that the longest side measures 18 cm, How do you know
hichkok12 [17]

Answer:

See the procedure

Step-by-step explanation:

we know that

<u>The Triangle Inequality Theorem</u>, states that the sum of the lengths of any two sides of a triangle is greater than the length of the third side

Let

a,b,c the lengths side of triangle

c is the greater side

The perimeter is equal to

P=a+b+c

P=36 cm

If c=18 cm

then

a+b=18

Applying the Triangle Inequality Theorem

a+b > c

18 > 18  ----> is not true

therefore

Principal Aranda is incorrect

The larger side cannot measure 18 cm

The largest side must be less than 18 cm

3 0
3 years ago
Mr. Blue drove from Allston to Brockton, a distance of 105 miles. On his way back, he increased his speed by 10 mph. If the jour
andrew-mc [135]

Answer:

His original speed was 60 mph.

Step-by-step explanation:

The average speed formula is shown below:

speed = distance / time

For the first leg of the trip Mr. Blue drove at a speed of "x" mph, for a distance of 105 miles, therefore the time that took to complete the trip is:

time 1 = distance / speed

time 1 = 105 / x h

On the second leg of the trip Mr. Blue drove faster at a speed of "x + 10" mph, so the time it took him to complete the trip was 15 minutes less, therfore:

time 2 = time1 - (15/60) = (105/x) - 0.25 = (105 - 0.25*x)/x h

Applyint the time and speed from the second leg to the average speed formula we have:

x + 10 = {105/[(105 - 0.25*x)/x]}

x + 10 = 105*x/(105 - 0.25*x)

(x + 10)*(105 - 0.25*x) = 105*x

105*x + 1050 -0.25*x² - 2.5*x = 105*x

-0.25*x² -2.5*x + 1050 = 0 /(-0.25)

x² + 10*x - 4200 = 0

x1 = [-(10) + sqrt((10)² - 4*(1)*(-4200))]/2 = 60

x2 = [-(10) - sqrt((10)² - 4*(1)*(-4200))]/2 = -70

Since his speed couldn't be negative the only possible value was 60 mph.

5 0
3 years ago
Read 2 more answers
Help plss!!show me how to do this and the answer for 20 or 15 points thx!
GarryVolchara [31]
Let me show you a website that has saved my behind so many times in high-school...

https://www.cymath.com/

4 0
3 years ago
X²=9 determine if x belongs to Q or belongs to Q dash​
Elis [28]

x = 3 is the answer can you pls add me brainliest answer

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I need help fast. It is number 14
Anon25 [30]

The percent is 145. That should be your answer

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