Hi , 3/4 times 28 equals to 84/4
28 is equivalent to 28/1
we just multiply straight across
28 x 3 equals to 84
4 x 1 equals to 4
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The surface area of the triangle is 1/2 * 6*8 so it is 24 sq units
The whole thing is 24* 7.5 so it is 180 sq units
umm I think it =(m)(x+−x)
=(m)(x)+(m)(−x)
=mx−mx
=0
hope it's right and you can download mathpapa
