At Southside Middle School, 20% of the students play an instrument. There are 305 students. How many students play an instrument? Please explain how you got your answer!! :D

What does x = in this equation x+3+2x=x+5

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

He letter p on the number line below represents the number . (use the hyphen for negative numbers and write answer as a decimal, such as –7.2) number line from negative 7 to positive 7 in increments of 0.5 is shown. only the whole numbers are labeled. a point labeled p is placed at the eleventh tick mark to the left of 0.