In Ms. Brown's 3rd period class, there are 15 boys and 5 girls. What percent of her class are boys?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Anyone know these questions? i need ,.

2f(x)= x+3 if 4 < x < 8 2x if x 28 2