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3 years ago

Can anyone help with this question.

Mathematics

1 answer:

ad-work [718]3 years ago

6 0

Answer:

a=14

b=6V2

Step-by-step explanation:

a=8+6=14

b^2=6^2+6^2

b^2=36+36=72

b=6V2

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Look at the angles marked a, b, c and d.

Sergio [31]

Answer:

acute angle : C

reflex angle : B

right angle : D

obtuse angle : A

5 0

3 years ago

Find the GCF 1. 20 and 60 2. 81 and 27 show you work

Liono4ka [1.6K]

Answer:1. 20

2.27

Step-by-step explanation:

1. 20* 3 = 60

2.27* 3 = 81

8 0

3 years ago

When do we use the addition and subtraction formulas for sine or cosine?

777dan777 [17]

When we need the cosine of the sum of two angles, we use the addition formula for cosine.

When we need the sine of the difference of two angles, we use the difference formula for sine.

Let's try one. Say we needed to know

$\cos 15^\circ
$

We're only expected to know the trig functions of 30/60/90 and 45/45/90 triangles. Fortunately, $15^\circ = 45^\circ - 30^\circ$ so

$\cos 15^\circ = \cos( 45^\circ - 30^\circ )$

$= \cos( 45^\circ) \cos(30^\circ ) + \sin(45^\circ) \sin(30^\circ)$

$= \dfrac{\sqrt{2}}{2} \cdot \dfrac{ \sqrt{3}}{2} + \dfrac{\sqrt{2}}{2} \cdot \dfrac{1}{2}$

$\cos 15^\circ = \frac{1}{4} (\sqrt{6} + \sqrt{2})$

4 0

3 years ago

I will give brainliest to first A circular hole was cut from the center of a plastic disc as shown below. The measurements are g

Eva8 [605]

Answer:

330

Step-by-step explanation:

5 0

3 years ago

A veterinarian has 70 clients who own cats, dogs, or both. Of these clients, 36 own cats, including 20 clients who own both cats

MrRa [10]

Answer:

The three statements are true.

Step-by-step explanation:

The question is incomplete:

A veterinarian has 70 clients who own cats, dogs, or both. Of these clients, 36 own cats, including 20 clients who own both cats and dogs. Which of the following statements must be true? Indicate all such statements.

A. There are 54 clients who own dogs.

B. There are 34 clients who own dogs but not cats.

C. There are 16 clients who own cats but not dogs.

A. There are 54 clients who own dogs.

TRUE. Of the 70 clients, only 36 own cats. There are left 34 clients that own only dogs. If we add the 20 clients that own both cats and dogs, we have 34+20=54 clients who own dogs.

B. There are 34 clients who own dogs but not cats.

TRUE. Of the 70 clients, only 36 own cats. Then, there are left 70-36=34 clients that own only dogs.

C. There are 16 clients who own cats but not dogs.

TRUE. Out of the 36 clients that own cats (only of with dogs), there are 20 that own both. Therefore, there are 36-20=16 clients that own only cats.

5 0

3 years ago