Please i need help i need to know what the terms and like terms of this is -x, -9x² + 12x² +7

If angle 2=3x +1 and angle 3=2x +4what is angle 2

What is the reflection image of (5,-3) across the line y = -x?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics