dom6547

Thanks I really found this interesting!!

Thanks to you both so much!

Oh shoot how did I forget the most important part!!! 

They are 

 \(x^4+7x^3+9x^2-17x-20\)

\(x^3-2x^2+3x-6\)

\(x^6-x^4-x^2+1\)

real sorry about that!

Lol yeah!

Thank you!

Think astc

The first quadrant of the graph gets A, the scecond one gets S, the third T, and the fourth C

The A means All functions

S is sine

T is tangent

C is cosine

if the angle is in the first/A quadrant all funcions (tan,sin,cos) will be positive

in the scecond/S quadrant any Sin function will be positive

in the third/T quadrant any Tan function will be positive

in the fourth/C quadrant any Cos function will be positive

A good way to remember ASTC would be All Star Trig Class with the first letter of each word being the Letters you need. Yeah it is kind of cheesey but it works.

Cos(143) would be negative because 143 degrees are in the scecond/S quadrant which only has Sin funtions being positive and we are using a Cos function.

Sin(7pi/8): 7pi/8 is 157.5 degrees which is in the Scecond/S quadrant we are using a Sin function so it is positive.

Tan(192) is positive because 192 degrees would be in the/T third quadrant which has Tan functions positive.

Sec(-4pi/5) is 1/cos of -144 degrees.  if we go back from 0 degrees by 144 degrees we get 216 degrees which is in the third/T quadrant. We are using a Sin function not a Tan funcion so it would be negative.

Hope that helps!

The y-intercept is -5 and the slope is zero.

here is a link to a graph I made that shows this graph

https://www.desmos.com/calculator/moychqhke9

You see when the line crosses the y-axis which is the line in the middle, that is the y-intercept. in the graph it crosses the y-axis when it's y-value is negative 5. The slope is zero because there is no change in it going up or down. As you can see the line remains flat which gives it this slope of zero.

Hope that helps!

THANK YOU MUCH!!!

a/.2

or

1/.2=2

it might be either of these depending on what you meant. I didn't understand if you meant a dollars as in a is a variable, or as a dollars as in 1 dollar.

If you meant a as a variable it is a/.2. 

if you meant a as in 1 it is 1/.2=2

Hope this helped!

Thank you!

The spell that would turn you into kelp has been reversed!