PLEAE HELP I WILL GIVE BRAINLIST can someone please help with 4,5,6 and use the box method on a paper please I need this ( show work ) please!

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Write a division equation you could use to find a, the number of miles ava is in charge of. what is the value of a? write your answer is simplist form

Determine whether the graphs of y=8x+5 and -y=8x-5 are parallel, perpendicular, coincident, or none of these. a. coincident b. parallel c. perpendicular d. none of these