Aphotographer wants to enlarge a 5x7 photo for a wall mural without distorting its width-to- length ratio. what are the largest dimensions to which he can enlarge the photo without having its perimeter exceed 840 inches?

The largest dimension of the enlarged photo will be: Width= 175 inches and Length= 245 inches.

Explanation

Dimension of the original photo is 5×7 . That means the ratio of the width to the length is 5 : 7

So, lets assume the width is and length is for the enlarged photo.

Formula for the perimeter of a rectangle

As the perimeter of the enlarged photo should not exceed 840 inches, so...

That means the maximum value of must be 35.

So, the largest possible width inches

and the largest possible length inches

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.