Answer:
first answer is correct
Step-by-step explanation:
Hello, we want to write 2 + 4 + 6 + ... + 20
for n = 1, 2n = 2*1 =2
for n = 2, 2n = 2*2=4
for n = 3, 2n=2*3=6
etc
so

thanks
Download the app photo math, it will give u all the answers for those and shows the work
Change the y to w the app didnt have the letter w so i just had to choose another letter
Answer:
Hey! I believe this is your answer:
4 glasses
Hope this helped!
Step-by-step explanation: