Ineed finding the least common multiple for each pair

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.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?