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emmainna [20.7K]
3 years ago
8

Please help me! Will give brainlst :)

Mathematics
2 answers:
sergey [27]3 years ago
8 0

Answer:

12. 6.4

13. 20

Step-by-step explanation:

This is the Pythagorean theorem, which says a^2+b^2=c^2. So for problem 12 we have 4^2+5^2=c^2. Since, 16+25=41, c=sqrt41 which is about 6.4. For problem 13 we have 15^2+b^2=25^2. Since 25^2-15^2=400, b=sqrt400 which is 20. Hope this helps!

Aleks [24]3 years ago
7 0

Answer:

12. 6.4

13. 20

Step-by-step explanation:

Mathematics: <u>Define and explain.</u>

This is a right triangle, so the Pythagorean Theorem applies.

The Pythagorean Theorem states that the sum of the squared side lengths of a right triangle must equal the hypotenuse when squared.

The legs of a triangle are the sides that form the right angle.

The hypotenuse is the longest side; the hypotenuse is always diagonal from the small square indicating a right angle.

a^2+b^2=c^2

a,b-legs

c=hypotenuse

Mathematics: <u>Solve.</u>

In the first triangle, the missing side length is the hypotenuse.

5^2+4^2=c^2

25+16=c^2

c^2=41

**41 IS NOT A PERFECT SQUARE. THEREFORE, I MUST ROUND THE SQUARE ROOT TO THE NEAREST TENTH.**

6.40312424 ≈ 6.4

c=6.4

Hence, the hypotenuse, c, is equal to 6.4.

In this second triangle, we are solving the find one of the legs.

15^2+b^2=25^2

225+b^2=625

625-225=400

b^2=400

b=20

Hence, one of the legs, b, is equal to 20.

Mathematics: <u>Conclude.</u>

12) The missing side is equal to 6.4 when rounded to the nearest tenth.

13) The missing side is equal to 20.

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Kryger [21]

Answer:

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Step-by-step explanation:

let x be the larger number and y the smaller , then

x = 5y + 18 → (1)

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substitute x = 5y + 18 into (2)

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15y + 54 + 4y = 16

19y + 54 = 16 ( subtract 54 from both sides )

19y = - 38 ( divide both sides by - 19 )

y = - 2

substitute y = - 2 into (1)

x = 5(- 2) + 18 = - 10 + 18 = 8

then larger number is 8 and smaller is - 2

8 0
2 years ago
Please help will give brainlest for best answer and Thank You
kirill [66]
Is that a trick question wouldn't it be 20??? I'm confused
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