What is the total surface area of the square pyramid? ​

The table respent two linear functions the equation respented by the first tables is given

What does x = in this equation x+3+2x=x+5

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists