Aladder (represented in the figure above by the dotted line) placed up against a wall meets the wall at a height of 25 feet. if the ladder is 30 feet long, then what is the approximate angle of elevation that the ladder forms with the ground?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?