How to tell if it’s a right triangle from the legs and hypotenuse

Given: x - 4x > 0, then the solution set in interval notation is: (-2, 0) true o false

Abox of chocolates cost $7 which equation relates the number of boxes sold parentheses x parentheses and total cost of the boxes sold parentheses y parentheses

Zoe paid $18.60 in sales tax in tips for her dinner the sales tax rate is 11% and she tipped 20% what was the price of zoe’s dinner before sales tax and tips