Mental Math. Simplify the expression -1 3/4 + (-1/4). Use pencil and paper. Describe the steps you use to simplify this expression using mental math. Tell why this expression allows you to use mental 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.

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

What is the equation of the parabola with focus (-1,-1) and directrix y=1?