PLEASE I NEED HELP PLEASE 28 POINTS IT IS MATH

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.

Describe the relationship between the angles of similar triangles and the sides of similar triangles

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64