Helene is finding the sum (9+10i) + (-8+11i). She rewrites the sum as (-8+11)i + (9+10)i. Which statement the property of addition that she made an error in using.

Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?

Lucy spent $165 in december using a new credit card. in january, she began paying between $15 and $25 each month towards her account balance.