Answer:
Final answer in simplified form is ![-7x^2+10x-18](https://tex.z-dn.net/?f=-7x%5E2%2B10x-18)
Step-by-step explanation:
Given expression is ![(-7x^2+4x-3)+(6x-15)](https://tex.z-dn.net/?f=%28-7x%5E2%2B4x-3%29%2B%286x-15%29)
Now we need to find an equivalent expression for ![(-7x^2+4x-3)+(6x-15)](https://tex.z-dn.net/?f=%28-7x%5E2%2B4x-3%29%2B%286x-15%29)
First we can distribute the positive sign and remove the parenthesis the combine like terms
![(-7x^2+4x-3)+(6x-15)](https://tex.z-dn.net/?f=%28-7x%5E2%2B4x-3%29%2B%286x-15%29)
![=-7x^2+4x-3+6x-15](https://tex.z-dn.net/?f=%3D-7x%5E2%2B4x-3%2B6x-15)
![=-7x^2+4x+6x-3-15](https://tex.z-dn.net/?f=%3D-7x%5E2%2B4x%2B6x-3-15)
![=-7x^2+10x-18](https://tex.z-dn.net/?f=%3D-7x%5E2%2B10x-18)
Hence final answer in simplified form is ![-7x^2+10x-18](https://tex.z-dn.net/?f=-7x%5E2%2B10x-18)
Answer:
4) Increase from 0 to 1
Step-by-step explanation:
We have to analyze the value of cos(Ф) from -π/2 to 0. This can be done if we simplify evaluate the value of cos(Ф) at these two extreme.
![cos(-\frac{\pi}{2}) = cos(\frac{\pi}{2} )=cos(90)=0\\\\ cos(0)=1](https://tex.z-dn.net/?f=cos%28-%5Cfrac%7B%5Cpi%7D%7B2%7D%29%20%3D%20cos%28%5Cfrac%7B%5Cpi%7D%7B2%7D%20%29%3Dcos%2890%29%3D0%5C%5C%5C%5C%20%20cos%280%29%3D1)
This shows that value of cos(Ф) is 0 at -π/2 or -90 degrees and increased to 0 at 0 degrees.
This answer can be validated if you visualize the graph of cos function. Cos function has a peak at 0 degrees, i.e. a value equal to 1. On right and left side of 0 degrees, the curve starts falling down and eventually touches the horizontal axis at 90 degrees and -90 degrees. This is shown in the graph attached below:
Answer: c
Step-by-step explanation:
Answer:
The answer is C.
Step-by-step explanation: