Lets say two numbers are x and y
x+y=70-----------------------eq1
x=4y--------------------eq2
4y+y=70
5y=70
y=70/5
y=14
then x=4*14
x=56
Square root means 46225^1/2 so the answer is 65
Answer:
I have no ide- the correct answer -7 pls brainliest
Step-by-step explanation:
Answer:
The roots are real and distinct.
Step-by-step explanation:
Given the following equation:
![x^{2} + kx - k -2 =0](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B%20kx%20-%20k%20-2%20%3D0)
In this problem, a = 1, b = k and c = -k - 2
The discriminant is b² - 4ac, and for the roots to be real and distinct, it must be at least or greater than 0.
We get,
(k)²- 4(1)(-k - 2) = 1 - 4(-k - 2)
= k² + 4k + 8
Let's check:
At k = -2,
![(-2)^{2} + 4(-2) + 8 = 4 - 8 + 8 = 4 ](https://tex.z-dn.net/?f=%28-2%29%5E%7B2%7D%20%2B%204%28-2%29%20%2B%208%20%3D%204%20-%208%20%2B%208%20%3D%204%0A%0A%0A)
At k = 0,
![(0)^2 + 4(0) + 8 = 8](https://tex.z-dn.net/?f=%280%29%5E2%20%2B%204%280%29%20%2B%208%20%3D%208%20)
At k = -100,
![(-100)^2 + 4(-100) + 8 = 10,000 - 400 + 8 = 9608](https://tex.z-dn.net/?f=%28-100%29%5E2%20%2B%204%28-100%29%20%2B%208%20%3D%2010%2C000%20-%20400%20%2B%208%20%3D%209608)
Therefore, we can conclude that for all values of k, the roots are real and distinct.
This has been a long way in answering this question, so it would be great if you could mark me as brainliest
Independent - Size/Type of pizza
Dependent - The cost of pizza