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sleet_krkn [62]
2 years ago
13

What is the answer to this 8x+14y=4 -6x-7y=-10

Mathematics
1 answer:
cestrela7 [59]2 years ago
8 0

Answer:

14x=4-21y

Step-by-step explanation:

You might be interested in
I'm having a hard time with this question so someone help please
bulgar [2K]

Answer:

  7.7 km

Step-by-step explanation:

This question is asking you to find the third side of a triangle in which two sides and an angle not between them are given. The law of sines provides the necessary relationships.

<h3>Law of Sines</h3>

The Law of Sines tells you that triangle side lengths are proportional to the sine of the opposite angle. For this triangle TPJ, the relation is ...

  t/sin(T) = p/sin(P) = j/sin(J)

We are given T=68°, p=5.2 km, t=7.5 km, and we are asked to find the length of j, the TP distance.

<h3>Setup</h3>

We know the sum of angles in a triangle is 180°, and the sine of an angle is equal to the sine of its supplement. This lets us fill in the Law of Sines equation like this:

  7.5/sin(68°) = 5.2/sin(P) = j/sin(68°+P) . . . . . solve for j

<h3>Solution</h3>

This can be solved in two steps. First, we find angle P, then we use that to find length j.

  sin(P) = 5.2/7.5 × sin(68°) ≈ 0.642847

  P = arcsin(0.642847) ≈ 40.0045°

Now, we can find j:

  j = 7.5 × sin(68° +40.0045°)/sin(68°) ≈ 7.693 . . . km

The distance from the tower to the plane is about 7.7 km.

__

<em>Additional comment</em>

We have used T, P, and J to refer to the vertices at the tower, plane, and jet.

The triangle can also be solved using the Law of Cosines. In that case, the missing side will be the solution to a quadratic equation with irrational coefficients.

3 0
2 years ago
Andrew is showing his work in simplifying -4.5 + 4.2 + 5.6 - 7.3. Identify
Hitman42 [59]

Answer:

hence the answer for given problem is -2, but andrew get -21.6 which is wrong

Step-by-step explanation:

8 0
1 year ago
<img src="https://tex.z-dn.net/?f=%28x%20-%201%29%28%20x%20-%20%28%20%5Cfrac%7B1%7D%7B2%7D%20%2B%203i%29%28x%20-%20%28%20%5Cfrac
abruzzese [7]

(X-1)(\frac{37}{4} -3ix+\frac{x}{2} )

Hope this helps

Mark me as brainliest pls begging u

3 0
3 years ago
Jack orders a salad with 2 dressings for lunch. There are 13 dressings to choose from. How many different ways can he select a s
Bumek [7]

Answer:

26 different ways of selecting a salad

Step-by-step explanation:

multiply 13 times 2 to find the number of possibilities

8 0
3 years ago
Read 2 more answers
2x - 5[4 + 3 (x + 2)] = 9​
Ugo [173]

Step-by-step explanation:

i hope you will get the answer

6 0
2 years ago
Read 2 more answers
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