3 * 3 1/2 =
3 * 7/2 =
21/2 =
10 1/2 or 10.5 <==
When you multiply the first equation by 3, you get:
3 × 3x = 9x
3 × y = 3y (but when added, that part gets eliminated)
3 × 3 = 9
So you end up with
9x + 3y = 9
x - 3y = -2
(add)
10x = 7
So your answer is B. 10x = 7. I hope this helps!
Two figures are similar are one of them can be obtained from the other with some transformations (reflections, translations, rotations, dilations) <span> . The circle is defined by only one length - the radius.
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To prove that all circles are similar you would use the sequence of similarity translation and dilation.
A translation, followed by a dilation with scale factor r2/r1 will map one circle onto the other, thus proving that the circles are similar.