Can you help me solve. My teacher got those answers but I don’t know how.

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.

Pls! does anybody know a shortcut for answering these types of questions in the future?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9