The diagram below represents a photograph in a frame. The photo has a perimeter of 23 inches, and the area of the whole figure is 58.5 square inches. If the frame is 1 inch thick, what is the area of the photo in square inches?
ok, lets say the length and width of the photo is l and w.
then, 2(l+w)=23
and if the frame is 1 inch, (l+1+1)(w+1+1)=58.5
then we just solve the system of equations and get l = 7 and w = 4.5 so the area is 31.5
Do you understand what mworkhard has presented so far? I will assume so ....
2(L+W) = 23 (1)
(L+2)(W+2)=58.5 (2)
LW+2(W+L)+4=58.5
sub in (1)
LW+23+4=58.5
LW+27=58.5
LW=31.5
L=31.5/W
sub into (1) to find W
2(L+W) = 23 (1)
2(31.5W+W)=23mult both sides by W2W(31.5W+W)=23W63+2W2=23W2w2−23w+63=0w=23±√529−5044w=23±√254w=23±54w=4.5or7
Length = 7 width =4.5 inches
omg how did i not see this! Here is how u can solve the system:
Where I got my steps: https://www.symbolab.com/solver/step-bystep/2%5Cleft(l%2Bw%5Cright)%3D23%2C%20%5Cleft(l%2B1%2B1%5Cright)%5Cleft(w%2B1%2B1%5Cright)%3D58.5