Im pretty sure it would be doubling the length of each side
I’m having a hard time understanding your question
2x+1=13 x=6 so an ok answer would be: 2x+10=40 x=15
$36 x 1.07 = $38.52
The cost will be $38.52
Tax on this is $2.52
Red line shows
y=x^2-4 , cause it's going through point (0,-4)
So blue line shows
y= -x^2+1 Point (1,0) belong to it , moreover x factor is negative , so the arms of parabola will go down
Have nice evenig :)
Greetings From Poland.