Determine if the expression 4.2 - 1025 + 2x² is a polynomial or not. If it is a polynomial, state the type and degree of the polynomial.

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

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Me n o w. i need t h i s. 10 points