Homework Help: math

Posted by Lea on Monday, January 25, 2010 at 10:32pm.

a photo 5 inches wide and 7 inches long is enlarged. The sides of the new photo are in proportion to the original. The new photo is 14 inches wide. how do i find the length

math - Ed, Monday, January 25, 2010 at 10:40pm
us proportions, then cross multiply:

5/7 = 14/x

5*x = 7*14

5x = 98

5x/5 = 98/5

x = 19.6 inches in length
math - Ms. Sue, Monday, January 25, 2010 at 10:40pm
This is a good problem for a proportion. Let x equal the new length.

5/14 = 7/x

Cross multiply:

5x = 98
x = 19.6
math - ron, Tuesday, July 13, 2010 at 9:16pm
7.6x-3.5x= -123
math - ron, Tuesday, July 13, 2010 at 9:17pm
7.6x-3.5x= -123

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