Find the 84th term of the arithmetic sequence 18, 31, 44

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.

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Explain how you do each step what term makes it inconsistent y=2x - 4 ?