The floor in a cube shaped room had a width of 2x + 5. If the area of the floor is 625 sq ft what is the value of "x"?

Question

sooobored · Answer

cube - all sides are the same length

royalranger · Answer

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redman15 · Answer

Thx but it's multiple choicee A.310ft
B.10ft
C.15ft
D.17.5ft

troy121101 · Answer

then just plug each solution into the equation by substituting for x, and solve

troy121101 · Answer

for example, instead of "2x - 5" you would write out, "2 * 10 - 5"

troy121101 · Answer

or "2 * 310 - 5

troy121101 · Answer

and then you should have your answer, if one of them equals 625ft^2, then that is the answer

redman15 · Answer

So how do i kn wat my answer is if I just plugged in the answer choices

troy121101 · Answer

sorry, I meant +5, not -5

troy121101 · Answer

plug in your answer choices, and then solve the equation, if one of those solutions equals 625, then you have the answer to your question

sooobored · Answer

the area of a square is 
A=s^2
side length s = 2x+5
area is given as 625 ft^2

625=(2x+5)^2

sooobored · Answer

solve for x

redman15 · Answer

Ok thx both of u I mean I thought y'all was gonna do it but I'll try

troy121101 · Answer

I will help you out, but I wont give you the answer straight up