Solve the following system of equations for x: 4x + 6y = 68 2x + 6y = 76 A. x = - 14 B. None of these. C. x = - 4 D. x = 14 E. x = 4
Top answer · 3 votes
option C is correct More
Answer:
The roots are real and distinct.
Step-by-step explanation:
Given the following equation:

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,

At k = 0,

At k = -100,

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
Answer:
True.
Step-by-step explanation:
Lateral Surface area of cone=πrl=πr×2h=2πrh
Lateral surface area of cylinder=2πrh
Answer:
3.2÷0.32×(0.73+0.27)^2= 10