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uranmaximum [27]
3 years ago
12

HELP FAST GIVE A DECENT AMOUNT OF POINTS! FOR EASY!

Mathematics
1 answer:
laila [671]3 years ago
4 0

Answer:

The value of angle is 56.9°

Step-by-step explanation:

First, you have to find the length of hypotenuse using Pythagoras' Theorem, c² = a² + b² :

{c}^{2}  =  {a}^{2}  +  {b}^{2}

let \: a = 8.25 \\ let \: b = 6.45

{c}^{2}  =  {8.25}^{2}  +  {6.45}^{2}

{c}^{2}  = 68.0625 + 41.6025

{c}^{2}  = 109.665

c =  \sqrt{109.665}

c = 10.47cm \: (4s.f)

In order to find θ, you have to apply Sine Rule :

\sin(θ)  =  \frac{opposite}{adjacent}

let \: oppo. = 8.77 \\ let \: hypo. = 10.47

\sin(θ)  =  \frac{8.77}{10.47}

θ =  { \sin( \frac{8.77}{10.47} ) }^{ - 1}

θ = 56.9 \: (1d.p)

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Since the order of elements doesn't matter, we use the formula for combination as follows.

nCk= \frac{n!}{k!(n-k)!}

So the number of ways to choose 2 elements from a set of 4 elements would be
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Thus the answer is 6. 
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3 years ago
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Andrej [43]

Answer:

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Step-by-step explanation:

6 0
3 years ago
Please help. Question is in the picture
iragen [17]

Hey,here is the answer to ur question..!
1.BD=AE (given)
2. Ci Is the midpoint of BD and AE (given)
3. AC=EC (Cis the midpoint Of AE)
4. BC=DC (midpoint theorem)
5.angle ACB and angle ECD are vertical angles ( definition of vertical angles)
6. angle ACB=angle ECD (vertical angle theorem)
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Hope this helps u....!!!

5 0
3 years ago
Answer check? 15 points.
lesya692 [45]

Answer:

From what I know, that is correct

6 0
4 years ago
Solve the system 3x + 4y = 8 and y = 3/4x — 2 using any method. Classify the system.
Sergeeva-Olga [200]

3x +4y = 8

y = 3/4x - 2

Substitution Method

3x + 4(3/4x -2) = 8

Distributive Property:

3x + 3x -8 = 8

Simplify:

6x -8 = 8

Add 8 to each side:

6x = 16

Divide both sides by 6"

x = 16/6

x = 2 2/3

Now replace x with that and solve for y:

y = 3/4(2 2/3) - 2

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y=0

4 0
3 years ago
Read 2 more answers
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