Answer:
Eric practiced the piano for 2 hours this week
Step-by-step explanation:
If it tells us that Eric spent 1/4 of the time playing the piano and all the time he practice this week was 8 hours, then we have to multiply the 8 hours by 1/4
p = time he practice piano
p = 8h * 1/4
p = 2h
Eric practiced the piano for 2 hours this week
10 to the power of 2 is the same thing as 10 x 10 and therefore is equal to 100. :)
You can't square root a negatove number so there isn't a root
Since two people take both courses, we can subtract two from 7, 8, and 21, giving us 5, 6, and 19.
Add 5 and 6 together to get 11. Since eleven students are in those two groups, we can answer this. The answer will be 11/19.
Step-by-step explanation:
K=12 if you want explanation i will