The sum of two numbers is 42 and the difference is 20. what are the numbers?

larger number:
smaller number:

(can someone , i think the big # is 22 and the small one is 20 but im pretty sure thats wrong)

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice

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?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39