If the cost price of 5pens is equal to the selling price of 4 pens of the same kind, find the profit percentage.

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Which of those sequences is a geometric sequence

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?