What is the value of x in -2 + 3xy = 20?

Find the slope of a line given the following two points

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

Askateboard ramp is in the shape of a right triangle what is the height of the ramp