A picture inside a frame is 2 inches longer than it is wide. The picture is in a frame that has a width of 3 inches on each side of the picture. If the area of the picture, including the frame, is 195 inches^2, find the dimensions of the frame.

Respuesta :

Answer:

The dimensions of the frame are 15 in x 13 in

Step-by-step explanation:

Let

x ----> the length of the picture

y ----> the width of the picture

we know that

[tex]x=2+y[/tex] -----> equation A

The area of the picture, including the frame is

[tex]A=(x+6)(y+6)[/tex]

[tex]A=195\ in^2[/tex]

so

[tex]195=(x+6)(y+6)[/tex] ----> equation B

substitute equation A in equation B

[tex]195=(2+y+6)(y+6)[/tex]

solve for y

[tex]195=(y+8)(y+6)\\y^2+6y+8y+48=195\\\\y^2+14y-147=0[/tex]

solve the quadratic equation by graphing

The solution is y=7 in

see the attached figure

Find the value of x

[tex]x=2+7=9\ in[/tex]

Find the dimensions of the frame

[tex]x+6=9+6=15\ in[/tex]

[tex]y+6=7+6=13\ in[/tex]

therefore

The dimensions of the frame are 15 in x 13 in

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