Answer:
y=2x when x>5
Step-by-step explanation:
y=|x−5|+|x+5|
If x > 5 then x-5 is greater than 0 so we can remove the absolute value bars from the first term
x>5 then x+5 >0 so we do not need the absolute value bars on the second term
y = x-5 + x+5
Combine like terms
y = x+x-5+5
y = 2x
Answer:
![cos A = \frac{5}{13}](https://tex.z-dn.net/?f=%20cos%20A%20%3D%20%5Cfrac%7B5%7D%7B13%7D%20)
Step-by-step explanation:
The given triangle, ∆ABC is a right triangle.
To find cos A, we'd need to apply the trigonometric ratio formula, which is cos A = adjacent length/hypotenuse length
From the ∆ given,
AC = adjacent = 15,
BC = opposite = 36
We are not given the hypotenuse length AB.
==>Find the hypotenuse length AB, using the Pythagorean theorem formula:
c² = a² + b²
AB² = 15² + 36² = 225 + 1296 = 1521
AB = √1521
AB = 39
==>Find cos A:
cos A = adjacent/hypotenuse
![cos A = \frac{adjacent}{hypotenuse}](https://tex.z-dn.net/?f=%20cos%20A%20%3D%20%5Cfrac%7Badjacent%7D%7Bhypotenuse%7D%20)
Adjacent = AC = 15
Hypotenuse = AB = 39
![cos A = \frac{15}{39}](https://tex.z-dn.net/?f=%20cos%20A%20%3D%20%5Cfrac%7B15%7D%7B39%7D%20)
![cos A = \frac{5}{13}](https://tex.z-dn.net/?f=%20cos%20A%20%3D%20%5Cfrac%7B5%7D%7B13%7D%20)
Answer:
d should be correct
Step-by-step explanation:
prove me wrong