Perform the induced operation
(-7x+1)+(- 2x2 + 7x + 8) =

What is the slope of the line shown below?

Me because some of question i don’t understand

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