1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alekssandra [29.7K]
3 years ago
9

Please help will mark brainliest

Mathematics
1 answer:
motikmotik3 years ago
3 0

Answer:

16.5 cm

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides.

let x be the other leg, then

x² + 13² = 21²

x² + 169 = 441 ( subtract 169 from both sides )

x² = 272 ( take the square root of both sides )

x = \sqrt{272} ≈ 16.5 cm ( to the nearest tenth )

You might be interested in
To celabrate its 125th anniversary, a company produced 125 expensive teddy bears. These "125 karat Teddy Bears" are made of gold
Oxana [17]
N = 100000000 dollars
8 0
3 years ago
Find the length of the third side. If necessary, write in simplest radical form
mrs_skeptik [129]

Answer:the answer is 4 to the square root of 2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
gavin is setting up chairs for a piano recital. He places 5 chairs in the first row, 7 chairs in the second row, and 9 chairs in
Mashutka [201]

Answer:

I think it's 28

Step-by-step explanation:

7 0
3 years ago
What is the length of the unknown leg in the right triangle?
Rama09 [41]

Answer:

we will use Pythagorean's Theorem

25^{2}=20^{2}+b^{2}\\\\ b=\sqrt{25^{2}-20^{2}}\\\\ b=\sqrt{625-400} =\sqrt{225}\\\\ b=15

Therefore, the missing leg is  15 meters long.

Step-by-step explanation:

we will use pythagoras theorem

Given that,

One leg of the triangle is 20 meters long,

the hypothenuse is 25 meters long,

and the leg missing is called x.

we will use Pythagorean's Theorem

25^{2}=20^{2}+b^{2}\\\\ b=\sqrt{25^{2}-20^{2}}\\\\ b=\sqrt{625-400} =\sqrt{225}\\\\ b=15

Therefore, the missing leg is  15 meters long.

3 0
3 years ago
Read 2 more answers
Please help would mean the world to
Tresset [83]

A = L * W

Given:

L = x + 10 and W = x + 15

So

A = (x + 10)(x + 15)

A = x^2 + 10x + 15x + 150

A = x^2 + 25x + 150

Answer

x^2 + 25x + 150

5 0
3 years ago
Other questions:
  • Which of these best illustrates the main difference between the Republican and Democratic parties?
    11·1 answer
  • The differencee of 3 times a number and 18 is 39
    10·1 answer
  • Simplify.<br><br> 7 – 2 • 5 + 9 • 3<br><br><br><br> 102<br><br> 24<br><br> –30<br><br><br> 18
    9·1 answer
  • 1 Canadian dollar to Japan
    6·2 answers
  • 7.8 kilograms divided into 4
    6·2 answers
  • Use the Distributive Property to expand this expression.<br><br> z(–6.4 – 3.5x)
    8·1 answer
  • The ratio of white marbles to black marbles in a jar is 4:9.
    7·2 answers
  • 4a + 3b + 20 if a = 2 and b = 3<br> O 37<br> O 95<br> O 24<br> 0 32
    14·1 answer
  • Ruby frosted 8 cookies in 20 minutes. At this rate how<br> many cookies could she frost in 2 hours?
    6·1 answer
  • How much longer is a one inch button than a 3/8 inch button?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!