How many significant figures are there in the number 11?

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units

Find the difference (8ab+a+2) - (3ab+6)

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?