Which of the following is the product of the rational expressions shown below

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33