I Need help please I don’t get it

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

Is a positive integer raised to a negative power always positive

Which of the following is not a solution to the inequality graphed below? (-2, -4)(-1, -5)(0, -3)(2, -1)which of the following is a solution to the inequality graphed below? select all that apply.(-3, -3)(-1, -1)(-3, -1)(2, 2)