Evaluate each expression. Express the result in scientific notation. PLS I NEED THIS QUICK!!

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Consider the expression below. 9 + 4(x + 2) – 3.1 select the term that best describes "3" in the given expression. o a. coefficient variable exponent constant

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. after tax the total is 45.99. what percentage of the subtotal is the total?