If you mean the "x" is multiply, then your answer is 35x9+14x8+56x7−30x2−12x−48
Explanation:
=(5x2+2x+8)(7x7+−6)
=(5x2)(7x7)+(5x2)(−6)+(2x)(7x7)+(2x)(−6)+(8)(7x7)+(8)(−6)
=35x9−30x2+14x8−12x+56x7−48
=35x9+14x8+56x7−30x2−12x−48
What underlined digit nothing is underlined
So there are two ways.
First you could solve for y and plug it into the calculator. one equation for y1 and another for y2. Then go 2nd trace and press 5 and then press enter 3 times to find the intersection.
the second way is to solve by hand. I would suggest solve the first equation for y and plug the equation solved for y into the other equation. so y = -3x + 9 and 3x-5y=15. Then you could do 3x - 5(-3x+9) = 15. Finally solve for x and plug in x into both equations to see if you get the same y value.
The answer should be (10/3, -1)
The Trigonometric Pythagorean Theorem is always true:
If we solve for we get
We know
so both sides are clearly between zero and one.
It's actually much better to do geometry using squared sine, but that's a topic for another day. It comes from replacing angle, a complicated directed meeting of two rays, with the intersection of two lines. Among many advantages, this eliminates quadrants.
But we know sine and cosine can be positive or negative. So we need the multivalued square root:
The means that it might be plus, it might be minus, if you just tell me the cosine there's not (usually) enough information to know which.
So yes, sometimes
That's a negative sine. If the cosine is positive, is in the fourth quadrant. If the cosine is negative, is in the third quadrant.
6 total letters, 3 vowels. 3/6, or 1/2.