Answer:
D and C
Step-by-step explanation:
1) You can cross check using desmos.
2) cos(120) is - 0.5
I think it's 1/2 because 5/10= 1/2
I hope this helps!
One way to carry out this problem is to simply take the value that you already know, which is that 1/5 is 20 % and multiply it by 2 for 2/5 or 2 (1/5ths) and do this for all of them. There is a pattern that occurs for every increase in one out of denominator of 5.
Answer: She would have to practice for 3/4 of an hour left to reach her goal
10+x=5(1/5x+2)
10+x= x+10
-x -x
10=10
Answer- All real numbers or infinity many problems
