Answer:
x = 6.6
Step-by-step explanation:
law of cosines:
x² = b² + c² - 2ac · cosX
x² = 5² + 8² - 2(5 · 8) · cos 55°
x² = 25 + 64 - 80· cos 55°
x² = 25 + 64 - 45.89
x² = 89 - 45.89
x² = 43.11
x = √43.11
x ≈ 6.6
Answer:
9a-7
Step-by-step explanation:
8a-6+a-1
Collect like terms
8a+a-6-1
= 9a-7
Answer:
The highest.
Step-by-step explanation:
I'm assuming there is supposed to be a picture but the skier highest on the mountain will have the greatest gravitational potential energy.
Hi
The answer in this question is 14.5.
Just add those numbers together and divide it by the amount of students
Answer:
y = -6, x =2
Step-by-step explanation:
To solve by elimination, you have to line both equations up together. Then, you multiply both equations until one variable is removed.
2x+y = -2
5x + 3y = - 8
There are many different ways to solve an elimination problem, but generally you should look for the simplest route. Here, I would multiply the top equation by -3.
-6x -3y = 6
5x +3y = -8
Imagine you are adding the two equations together. You end up with
-x = -2
Then solve for x. In this situation, it is fairly simple. Take out a factor of -1.
x = 2
Finally, choose one of your beginning equations and plug your new-found x value back into the equation.
2(2) +y = -2
4 + y = -2
y = -6