TRUE OR FALSE. if the slopes of two lines are negative reciprocals, the lines are perpendicular

Three children each had the same amount of money in their savings account. one of the children withdrew three quarters of her moneyand spent it all on a $100 sports jersey. what was the total amount of money originally in the accounts?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse