# math

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An image on a slide is similar to it's projected image. A slide is 35 mm wide ande 21 mm high. It's projected image is 85 cm wide. To the nearest centimeter, how high is the image?

• math -

35/21 = 85/x

What I did was put the width of the images on the numerator of the fraction.

Multiply both sides by 21x to get rid of the denominators. We will have:

35x = 1785
Can you solve it from there?

• math -

51 cm

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