Can someone help me I need this

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form