What is 3,920,000,000,000 in scientific notation? 3.92×10103.92×10^10 3.92×10123.92×10^12 3.92×10−103.92×10^−10 3.92×10^−12

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Factor the following expression completely 6x^11-24x^7