If x^2 =25 then x=5 if y’all could help me I would appreciate it

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Is the number 128.439 a rational number

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?