in QRS the measure S=90ft the measure Q=79ft and RS=63ft find the length of QR to the nearest tenth of a foot

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Solve the system of equations. 2x-2y=-4 and x+y=8. show work

:)i need to know on which ones are corresponding, alternate interior, alternate exterior, or none of these.