() = (. + . ) + . where ℎ() represents the height in metres and represents the time in minutes. What is the height of the seat, to the nearest tenth of a metre, after 1.5 min?

there is no image attacted

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.