An iPhone X costs $1,000. One website is selling it for 20% off. What would the sale price be?

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related

Need plz been trying to do it for a long time and still haven’t succeeded

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.