State the difference between mass and weight

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Add the fractions and simplify 1/2+ 1/3