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11111nata11111 [884]
2 years ago
7

Two sides of a triangle have the same length. The third side measures 3 m less than twice that length.the perimeter of the trian

gle is 21 m. find the lengths of the three sides.
Mathematics
1 answer:
elena-s [515]2 years ago
7 0

Answer:

The lengths of three sides are <u>6 m, 6 m and 9 m</u>.

Step-by-step explanation:

Given:

Two sides of a triangle have the same length.

The third side measures 3 m less than twice that length.

The perimeter of the triangle is 21 m.

Now, to find the lengths of all three sides.

So, naming the three sides of triangle a, b, and c.

As given two sides of a triangle have the same length.

So, let the first side of triangle(a) be x.

And the other side(b) be same x.

Now, the third side(c) be 2x-3.

Perimeter = 21 m.

Now, putting formula to get the sides:

Perimeter=a+b+c

21=x+x+2x-3

21=4x-3

<em>Adding both sides by 3 we get:</em>

24=4x

Dividing both sides by 4 we get:

6=x

x=6.

Now, getting the sides of triangle by putting the value of x :

a = 6 m.

b = 6 m.

c = 2\times 6-3=12-3=9\ m.

Therefore, the lengths of three sides are 6 m, 6 m and 9 m.

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Answer:

y = 10m

Step-by-step explanation:

<u>Step 1:  Rewrite</u>

y = centimeters

y = millimeters * 10

y = 10m

Answer: y = 10m

6 0
3 years ago
PLEASEEEEEEEEE HELPPPPPPPPPP 70-100 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!! I NEED ONE MORE ANSWER BC I WANNA SEE WHICH ANSWER IS THE
Zina [86]

Answer and Explanation:

Gina wanted to swim at the pool. She is allowed to spend at most $30. The cost to swim in the pool is 3 dollars per hour plus a flat fee of $3. How many hours can Gina swim without going over her spending limit?

This problem can be represented by  3x+3\leq 30.

'x' would be the number of hours. "At most" means less than or equal to. So, the value of x would have to be less than or equal to 30.

3x+3\leq 30-3\\\\3x\leq 27\\\\3x/3\leq 27/3\\\\\boxed{x\leq9}

So, Gina would have a maximum of 9 hours to swim in the pool.

Hope this helps.

3 0
3 years ago
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denis-greek [22]
You factor out primes from the root, for example:
root 100
you can get 10 from it, or we'll use 5

100/5=20
20/5=4
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3 years ago
Find the missing terms.<br> 3, _____, _____, 21 (arithmetic)
Rom4ik [11]

Answer:

Hello There!!

Step-by-step explanation:

The answer is 3,9,15,21.

hope this helps,have a great day!!

~Pinky~

4 0
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Key:

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