HELP I NEED THIS ASAP

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.

The oates family went out for dinner the price of the meal was $33.95 the sales tax was 7.25% of the price of the meal . the tip was 15% of the meal and the sales tax . how much money did the oates family pay for the meal, including tax and tip

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.