<u>Step-by-step explanation:</u>
If no sides of a triangle are congruent (equal) then it is SCALENE
If two sides of a triangle are congruent (equal) then it is ISCOSCELES
If all sides of a triangle are congruent (equal) then it is EQUILATERAL
90, 35, 55: no sides are congruent = SCALENE
700, 550, 550: two sides are congruent = ISCOSCELES
350, 400, 1000: no sides are congruent = SCALENE
460, 460, 440: two sides are congruent = ISCOSCELES
1200, 300, 300: two sides are congruent = ISCOSCELES
Answer:
Step-by-step explanation:
First we need to set this ratio up in the coordinate plane. Because this is tangent, the 3 goes opposite the reference angle and the 4 goes along the x-axis, adjacent to the reference angle. We see that we are missing the third side of the triangle when we do this, namely the hypotenuse. We use Pythagorean's Theorem to find that this side is 5. Now we have to deal with the identities for each sin(2A) and cos(2A).
sin(2A) = 2sin(A)cos(A)
We know from the triangle we drew in the coordinate plane that
and 
so we fill in the formula accordingly and then simplify:
cos(2A) has 3 identities; I just picked the one I thought would be easiest to use and went with that one. Regardless of which one you pick you will get the same answer as long as you do the math correctly.
and filling in the formula:
I'm not sure why you have 7/2 there...
The answer is 2/7 or 0.28571428... You can find this the same way as your other problem by finding the common denominator and multiplying. (Also, if you go on Mathway, you can find solutions to almost any problem really quickly.)
Hope this helps!
~Jessica
I am sorry, but nobody can help until you put the question. Assuming it is Algebra, I can write this as function which would be y = 3x + 14.99 . Also, x has to be greather than zero because you cannot undownload a movie. y can also be something like f (m). m means the movies you downloaded. So it could also be f = 3m + 14.99 . If you want to graph it, I could do it for you.
Answer:
it is a invalid equation
Step-by-step explanation:
20 is not equal to 8
