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cluponka [151]
3 years ago
6

Pls help :Find the missing side or angle. Round to the nearest tenth.

Mathematics
2 answers:
Nitella [24]3 years ago
7 0

Answer:

C° = 71.6056

Step-by-step explanation:

Law of Cosines: c² = a² + b² - 2abcosC°

Step 1: Plug in known variables

29² = 30² + 15² - 2(30)(15)cosC°

Step 2: Evaluate

841 = 900 + 225 - 900cosC°

-59 = 225 - 900cosC°

-284 = -900cosC°

71/225 = cosC°

cos⁻¹(71/225) = C°

C° = 71.6056

And we have our answer!

ruslelena [56]3 years ago
3 0

Answer:

  79.0°

Step-by-step explanation:

The Law of Cosines is used for this purpose. It tells you ...

  a² = b² +c² -2bc·cos(A)

Solving for A gives ...

  cos(A) = (b² +c² -a²)/(2bc) = (15² +29²-30²)/(2(15)(29)) = 166/870

Using the inverse cosine function, we find the angle to be ...

  A = arccos(166/870) ≈ 79.00026°

  A ≈ 79.0°

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Two sides of a triangle are as follows: 2 centimeters and 5 centimeters. Describe the possible lengths of the third side
Elden [556K]

Answer:

3cm < Third side < 7cm

Thus third side can take any value between 3cm and 7 cm

(note: excluding 3 cm and 7 cm)

If the value are integral then possible values of third side are

4cm, 5cm,6cm

Step-by-step explanation:

This question can be solved using given by Triangle Inequality Theorem Given below.

  • Sum of two sides is always greater than value of third side
  • Difference of two sides is always less than value of third side

Given two sides are 2cm, 5cm

Sum of two sides = (2+5)cm = 7 cm

Difference of two sides = (5-2) = 3 cm

Let the third side be X

thus according to Triangle Inequality Theorem

X <  Sum of two sides of given triangle

X < 7cm  -----1

X > Difference of two sides

X > 3cm  ----1

combining expression 1 and 2 we have

3cm < X < 7cm

Thus third side can take any value between 3cm and 7 cm

(note: excluding 3 cm and 7 cm)

If the value are integral then possible values are

4c, 5cm,6c

7 0
2 years ago
Explain how multiplying with 6 is like multiplying by 3
ioda
3 doubled equals 6, so every second multiple of three is also a multiple of six.

Examples:

3 times 4 is 12, and 6 times 2 is 12

3 times 6 is 18, and 6 times 3 is 18

3 times 8 is 24, and 6 times 4 is 24
5 0
3 years ago
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In the diagram, Ray K QJKM is a straight angle.
mixas84 [53]

The true statements about the diagram given are:

3. m∠JKL = 45°

4. m∠MKQ + m∠PKQ = m∠PKM

5. PK is an angle bisector

<h3>What is an Angle Bisector?</h3>

An angle bisector is a segment that divides a given angle into two parts that are congruent to each other.

The missing part of the question is in the image attached below.

In the image given, PK bisects the straight angle JKM since angles JKP and MKP both equal 90 degrees (right angle).

Therefore, m∠JKL = m∠PKL = 45°

m∠MKQ + m∠PKQ = m∠PKM based on the angle addition theorem.

Therefore, the true statements are:

3. m∠JKL = 45°

4. m∠MKQ + m∠PKQ = m∠PKM

5. PK is an angle bisector

(see image attached below)

Learn more about angle bisector on:

brainly.com/question/24677341

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3 0
1 year ago
Evaluate 6x - 3, when x = 2 14
Rudiy27

Answer:

6x214=1284

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Step-by-step explanation:

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3 years ago
Hermione buys 9/10 of a pound of plums. The plums cost $1.30 per pound. How much does Hermione spend on plums? $0.90 $1.17 $1.30
qwelly [4]
<h3>Answer:</h3>

\large\boxed{\$1.17}

<h3>Step-by-step explanation:</h3>

In this question, we're trying to find how much Hermione spent on plums.

We know that:

  • Hermione bought 9/10 of a pound of plums
  • Plums cost $1.30 <em>per pound</em>

With the information above, we can solve the question.

Since we know that plums cost $1.30 per pound and Hermione bought 9/10 of a pound, we would multiply 1.30 by 0.90 in order to get the price Hermione bought the plums for. Hermione is pretty much paying 90% of the cost of a pound.

1.30*0.90=1.17

When you multiply, you should get 1.17

This means that Hermione spent $1.17 on 9/10 pound of plums.

<h3>I hope this helped you out.</h3><h3>Good luck on your academics.</h3><h3>Have a fantastic day!</h3>
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3 years ago
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