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ziro4ka [17]
2 years ago
5

Please help!!! I’ll mark as brainliest :)

Mathematics
1 answer:
lyudmila [28]2 years ago
5 0

Answer:

the third one

Step-by-step explanation:

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Quickly help :<br> I don’t know WTH I’m doing and my teacher won’t explain
tresset_1 [31]

These are what I call the Two Tired Triangles of Trig, 30/60/90 and 45/45/90. If you learn these cold now you'll save yourself some hassle down the road.  These are generally the only right triangles teachers use when they want 'exact' answers.

Here are the facts to remember:

The ratio of the sides of the 45/45/90 triangle are 1:1:√2

The ratio of the sides of the 30/60/90 triangle are 1:√3:2, with the smallest opposite the 30 degree angle.

OK, let's fill in the angles first.  Where we have a right triangle with 30/60/90 we fill in the missing one. For the half squares, the acute angles are 45 degrees.

For the lengths we apply the ratios.  Hypotenuse of 45 degree right triangle is 4, so sides are 4/√2 = 2√2.  When that's opposite 30 degrees, the other two sides are 2√2×√3 = 2√6 and 2×2√2=4√2.  

2√6 is one side of a square, so all sides.  The diagonal is 2√6×√2=2√12=4√3.  

Half the square side is the smallest leg of a 30/60/90, so √6, with other leg √6×√3=√18=3√2 and hypotenuse 2√6.

6 0
3 years ago
Does the tablets shown a proportional relationship? If so, what is the value of y when x is 10?
kaheart [24]

Answer: Understand that a relationship between two variables, x and y, is proportional if it can be expressed in the form y/x=k or y=kx.

5 0
2 years ago
A bike rental company charges a $5 service fee and $1 per hour. If this situation is represented as a function, what would be th
____ [38]

Answer:

j

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Find the inverse of y=x2-10x
anzhelika [568]
<span>this is pretty hard but here is your answer 
</span>

y = x^2 - 10x + 25 - 25

<span> y = (x-5)^2 - 25 </span>

<span> y+25 = (x-5)^2 </span>

<span> x-5 = +/-sqrt(y+25) </span>

 

<span> And you get TWO inverses: </span>

 

<span> x = 5 + sqrt(y+25), for x>=5 </span>

<span> x = 5 - sqrt(y+25), for x<=5</span>


5 0
3 years ago
Read 2 more answers
If a rectangle has a length of 4x and a width of x+5 what is the perimeter?
Paul [167]

Answer:

10x + 10 units

Step-by-step explanation:

To find the perimeter of a rectangle, you can simply add up the length and width, and then multiply that sum by 2. The sum of the dimensions is 4x + (x + 5) = 5x + 5 and two times that would then be 2(5x + 5) = 10x + 10.

7 0
3 years ago
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