Answer:
5.625
Step-by-step explanation:
The answer is -5/4
Shower you the steps
6x+5/x=2x
4x+5=0
4x=-5
X= -5/4
Hope that helps you
Answer:
Step-by-step explanation:
![5x - 2y = 13 \\ 5x - 13 = 2y \\ 2y = 5x - 13 \\ y = \frac{5}{2} x - \frac{13}{2} \\ equating \: it \: with \\ y = mx + b \\ slope(m) = \frac{5}{2}](https://tex.z-dn.net/?f=5x%20-%202y%20%3D%2013%20%5C%5C%205x%20-%2013%20%3D%202y%20%5C%5C%202y%20%3D%205x%20-%2013%20%5C%5C%20y%20%3D%20%20%5Cfrac%7B5%7D%7B2%7D%20x%20-%20%20%5Cfrac%7B13%7D%7B2%7D%20%20%5C%5C%20equating%20%5C%3A%20it%20%5C%3A%20with%20%5C%5C%20y%20%3D%20mx%20%2B%20b%20%5C%5C%20slope%28m%29%20%3D%20%20%5Cfrac%7B5%7D%7B2%7D%20)
Answer:
1) Both 15.
2) 25 and -25.
Step-by-step explanation:
1) Let the 2 numbers be x and 30 - x.
The product = x(30 - x)
f(x) = x(30 - x)
f(x) = 30x - x^2
Finding the derivative:
f'(x) = 30 - 2x
Finding the maximum:
30 - 2x = 0
x = 15.
This gives a maximum f(x) because f"(x) = -2.
So the numbers are 15 and 30 - 15 = 15.
2). If one number is x the other is y.
x - y = 50
y = x - 50
The product =
x(x - 50)
= x^2 - 50x
Finding the derivative:
2x - 50 = 0 for a minimum value.
2x = 50
x = 25.
So the numbers are 25 and 25-50 = -25.
Answer:
16
Step-by-step explanation:
multiply by 2