Give them brainlest to give someone brainlest you need two people to answer your question so now that I commented you can now give them just wait for a while :)
The problem ask to find the value of the cos(infinity) and the best answer, base on my further calculation and formulation that came up to a solution that leads me to an answer that the cos(infinity) is undefined but it has a range of (-1,1). I hope you are satisfied with my answer and feel free to ask for more
Answer:
D) 12
Step-by-step explanation:
3x+x=2x+24
4x=2x+24
4x-2x=24
2x=24
x=24/2
x=12
20x4=80
i am assuming this is correct this is how i learned just take all numbers in equation and multiply by each other