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Dennis_Churaev [7]
3 years ago
12

Someone help me understand how to do this

Mathematics
2 answers:
makkiz [27]3 years ago
5 0

Answer:

6.7 cm

Step-by-step explanation:

Wewaii [24]3 years ago
4 0

Answer:

6.7 cm

Step-by-step explanation:

To make use of the Law of Sines for finding b, you need to know the missing angle B. Since the sum of the angles of a triangle is 180°, you can find angle B as ...

B = 180° -82° -55° = 43°

Now, you put the numbers you know into the formula given and solve for b.

sin(A)/a = sin(B)/b

sin(55°)/(8 cm) = sin(43°)/b

Cross multiplying gives ...

b·sin(55°) = (8 cm)·sin(43°)

and dividing by the coefficient of b gives you ...

b = (8 cm)·sin(43°)/sin(55°) ≈ 6.7 cm

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Find the value of x.
ehidna [41]

Answer:

x = 25

Step-by-step explanation:

We know that the remaining angles add up to 90°, because the right angle (triangles have 180° total.)

2x + 15 + x = 90 | Given

3x + 15 = 90 | Combine x

3x = 75 | Subtract 15

x = 25

4 0
2 years ago
67 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
denis-greek [22]

Answer:

I think the answer is 5

Hopefully it works :)

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
How to solve it with walk through steps
mario62 [17]
You can say

x+y=5
x=5-y

You know the value of x, put it into the next equation.

3(5-y)-7y=19
15-3y-7y=19
15-19 = 10y
-4=10y
-4/10=y
-2/5=y

Put y value back into either equation to find value of x.

x+y=5
x-2/5=5
x=5+2/5
x=27/5

Therefore, x,y = (27/5, -2/5)

Hope I helped :)
6 0
3 years ago
What is the scientific notation for 222,000,000 ?
Leya [2.2K]
Rules for SN = must be a number from 1 and less than 10 times a power of 10

So our number becomes

2.22 x 10⁸  - It takes a move of 8 places to the right to make the number 222,000,000 
6 0
3 years ago
Homework help needed​
ivanzaharov [21]

Answer:

B

Step-by-step explanation:

Since LMNO is a parallelogram then MN and LO are parallel, thus

∠OLN = ∠MNL = 20° ( corresponding angles )

4 0
3 years ago
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