1. donavon and three friends go to a fair.
they each spends of their money on rides.
then they each spend $3 on food. at the
end of the day, donavon and his friends
have a total of $8 remaining. how much
money did each person bring to the fair?

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.

I’m still confused on how to work the percentages

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle