5% sales tax, because the total would be $42 and if you multiply 40 x 0.05 (the equation for tax) you get 2 and that is the amount of tax they charged you
Step-by-step explanation:
volume of cube=l³
=(11)³
=1331m³
volume of cuboid=l*b*h
=11*8*4
=352m³
0.10x+0.25y=11.40
remove the x and bring it to the other side using opposite operation getting:
0.10+0.25y=11.40x
remove the 11.40 from the right side to the left.
(0.10+0.25y)/11.40=x
I hope that helped. It's kind of confusing since there's no value for y.