Answer:
-8b + 9 - 5k
Step-by-step explanation:
I am assuming the blue highlighted portion is your answer, and is not a part of the initial question
(-4b + 15 - 7k) - (6 + 4b - 2k)
Combine like terms
-4b - + 4b
Negative + Positive = Negative
-4b - 4b = -8b
15 - 6 = 9
-7k - - 2k
Negative + Negative = Positive
-7k + 2k = -5k
Put them all together:
0b + 9 - 5k
Simplify
-8b + 9 - 5k
I got the same answer as you (just in a different order)
I believe you are right :) because they are the same
Y-INTERCEPT
![y = 5x^2 - 16x + 10](https://tex.z-dn.net/?f=y%20%3D%205x%5E2%20-%2016x%20%2B%2010)
The y-intercept is where the equation/curve/parabola cosses the y-axis.
The y-axis is where x = 0. (The x-axis is where y = 0)
To find the y-intercept:
![\text{y-axis} \rightarrow \text{x = 0} \rightarrow y = 5(0)^2 -16(0) + 10 = 10](https://tex.z-dn.net/?f=%5Ctext%7By-axis%7D%20%5Crightarrow%20%5Ctext%7Bx%20%3D%200%7D%20%5Crightarrow%20y%20%3D%205%280%29%5E2%20-16%280%29%20%2B%2010%20%3D%2010)
The y-intercept must be at (0, 10)
X-INTERCEPT (ROOTS/SOLUTIONS)
![y = 5x^2 - 16x + 10\\\text{make it equal 0}\\y = 0\\\therefore 5x^2 - 16x + 10 = 0](https://tex.z-dn.net/?f=y%20%3D%205x%5E2%20-%2016x%20%2B%2010%5C%5C%5Ctext%7Bmake%20it%20equal%200%7D%5C%5Cy%20%3D%200%5C%5C%5Ctherefore%205x%5E2%20-%2016x%20%2B%2010%20%3D%200)
We need to use the quadratic formula
The quadratic formula helps us find what values of
make the equation = 0
Quadratic formula: ![x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
![x=\frac{-(-16) + \sqrt{(-16)^2-4(5)(10)}}{2(5)}\\\\x = \frac{16 + \sqrt{256-200}}{10}\\x = \frac{16 + \sqrt{56}}{10}\\x = \frac{16 + 2\sqrt{14}}{10}\\x = \frac{8 + \sqrt{14}}{5}\\\\\\x=\frac{-(-16) - \sqrt{(-16)^2-4(5)(10)}}{2(5)}\\\text{doing the same thing...}\\\text{end up with...}\\x = \frac{8 - \sqrt{14}}{5}\\](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%28-16%29%20%2B%20%5Csqrt%7B%28-16%29%5E2-4%285%29%2810%29%7D%7D%7B2%285%29%7D%5C%5C%5C%5Cx%20%3D%20%5Cfrac%7B16%20%2B%20%5Csqrt%7B256-200%7D%7D%7B10%7D%5C%5Cx%20%3D%20%5Cfrac%7B16%20%2B%20%5Csqrt%7B56%7D%7D%7B10%7D%5C%5Cx%20%3D%20%5Cfrac%7B16%20%2B%202%5Csqrt%7B14%7D%7D%7B10%7D%5C%5Cx%20%3D%20%5Cfrac%7B8%20%2B%20%5Csqrt%7B14%7D%7D%7B5%7D%5C%5C%5C%5C%5C%5Cx%3D%5Cfrac%7B-%28-16%29%20-%20%5Csqrt%7B%28-16%29%5E2-4%285%29%2810%29%7D%7D%7B2%285%29%7D%5C%5C%5Ctext%7Bdoing%20the%20same%20thing...%7D%5C%5C%5Ctext%7Bend%20up%20with...%7D%5C%5Cx%20%3D%20%5Cfrac%7B8%20-%20%5Csqrt%7B14%7D%7D%7B5%7D%5C%5C)
The x-intercepts are at:
![(\frac{8 + \sqrt{14}}{5}, 0)\\(\frac{8 - \sqrt{14}}{5}, 0)](https://tex.z-dn.net/?f=%28%5Cfrac%7B8%20%2B%20%5Csqrt%7B14%7D%7D%7B5%7D%2C%200%29%5C%5C%28%5Cfrac%7B8%20-%20%5Csqrt%7B14%7D%7D%7B5%7D%2C%200%29)
7 is 45 degrees ndhdhdhdjdj
Answer:
c
Step-by-step explanation:
im pretty sure its c. every other one is wrong except a and c. and the placement for a is wrong. so i think c.