What is "the square of y decreased by the quotient of 28 and 7" in expression form?

For what values of x is x2 + 2x = 24 true?

Ill mark the brainliest if you me with the these three questions 7,8,9

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