fish tank's design specifies a length that is 8inches longer than the width. Height of the tank is to be 5inches longer than the width. Let w represent the width and write expression for the volume of the tank in terms of w.
(8+w)(5+w)
40+8w+5w+w^2
my answer is: w^2+13w+40
is that right?

Question

anonymous · Answer

Why on earth are these questions getting you to expand brackets? Factorised expressions look so much nicer <3

radar · Answer

Seems volume involves a cube as volume will be in cubic inches.

radar · Answer

Hey you didn't use the width for width

radar · Answer

multiply your answer by width

amistre64 · Answer

w ( w^2+13w+40)  :)

anonymous · Answer

which is what?
ok i see

radar · Answer

Good.

anonymous · Answer

so the answer is w(w^2+13w+40) or do i need to take w times everything inside the ()?

radar · Answer

You just did :)

radar · Answer

Yes,  the w is distributed to every term in the ()

anonymous · Answer

I'd either leave it as w(w+5)(w+8) or w^3 + 13w^2 + 40w

Pick one of the other, don't get stuck in the middle.

radar · Answer

Is it satisfactory to your understanding?

anonymous · Answer

yes

radar · Answer

Great, I am out to lunch.  good luck.