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gayaneshka [121]
3 years ago
11

- 7 - 9 = 7+(-9) Add.

Mathematics
2 answers:
sergiy2304 [10]3 years ago
7 0
The answer is True , I just answered this question
Tomtit [17]3 years ago
7 0

Answer:

-2=-2

Step-by-step explanation:

yes both are equal

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One leg in a right triangle is 11 ​m, and the hypotenuse measures 11√2 m. Find the length of the other leg.
ipn [44]

Answer:

\boxed{11m}

Step-by-step explanation:

Method #1: 45-45-90 Triangle

You can use the rules for a 45-45-90 triangle. These are:

→ Each 45-45-90 triangle is a right triangle with two additional 45° angles.

→ The triangle will have 2 legs, <em>x</em>, and one hypotenuse, <em>x</em>√2.

Therefore, because the problem gives values for one leg and the hypotenuse, the value for the one leg is equal to the value for the unsolved leg.

Method #2: Pythagorean Theorem

You can use the Pythagorean Theorem to solve for a missing side in a triangle. Please note, however, that the Pythagorean Theorem only works on <u>right</u> triangles.

The Pythagorean Theorem is defined as a^{2} + b^{2} = c^{2}, where <em>a</em> and <em>b</em> are both legs of the triangle and <em>c</em> is the hypotenuse.

Therefore, substitute the known value for <em>a</em>, 11, and the known value for <em>c</em>, 11√2. Then, evaluate each value to its power (except for <em>b </em>- it is unsolved) and simplify the equation with basic algebraic methods. Once your equation is down to b^{2}= ?, you should take the square root of both sides of the equation to get the value for <em>b</em>.

11^{2} +b^{2} =(11\sqrt{2} )^{2}\\121 + b^{2} = 242\\b^{2}=121\\b=11

4 0
3 years ago
In a test, +3 marks are given for every correct answer and -1 are given for every incorrect answer (i) Sona scored +20 marks tho
e-lub [12.9K]

Answer:

10 incorrect answers

Step-by-step explanation:

Correct answer = +3

Incorrect answer = - 1

Mark scored = 20

Number of correct answers = 10

Let:

Incorrect answers = y

Hence, we can fashion out the expression for total score :

(Number of correct answers * score per Correct answer + number of incorrect * score per incorrect) = total score

(10 * 3) + (y * - 1) = 20

30 - y = 20

-y = 20 - 30

-y = - 10

y = 10

10 incorrect answers

4 0
3 years ago
Mrs Rahlee bought 300 yards of ribbon to make flowers. She used 1.22 yards to make one large flower. She made 200 such large flo
Mamont248 [21]
So 1.22 per large flower
200 large flowers
1.22 times 200=244 yards used
subtract
300-244=56

56=100 smal flowers
divide both sides by 100
0.56=1 small flower
the answer is 0.56 yards=1 flower
7 0
3 years ago
Read 2 more answers
The perimeter of a sand volleyball court is 50 meters. It is 9 meters wide. How long is it?
andreyandreev [35.5K]
9(2) + 2(y) = 50. solve for y. 32=2y, y=16. It is 16 meters long.
7 0
3 years ago
Read 2 more answers
What is the area of the triangle?
Rainbow [258]

Answer:

15 im positively sure

Step-by-step explanation:

The 6 sides are the same sides

so 6+6=12

add the 3

12+3=15

5 0
3 years ago
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