Answer:
OOOOOOOOHHH SHUTE BROTHER SORRY WISHED I COULD HELP but im blonde so sowwy
Step-by-step explanation:
Https://www.desmos.com/calculator use this to graph your equations like this, it is very helpful to solve difficult math problems like these. :) The vertex is (-4,1) and even shows it on the graph
This is an arithmetic series with common difference 6
S13 = (13/2)[2*-5 + (13-1)*6)] = 403
90% of what is 63....
0.90x = 63
x = 63 / 0.90
x = 70....so 70 ppl work at stalling printing
