Translating this sentence into an equation gives:   12 = 0.60 (x) (12 equals 60%, represented as a decimal, times a number "x")   So to solve, divide both sides by 0.60, and x = 20.
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A midpoint can be found on a line segment, but not a polygon like a triangle.  If you're referring to the centroid, or some other such point in or around a triangle, you will need to take a few steps to do so.  The centroid is my best guess to what you're referring to, and … Read more
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Let x be one of the numbers. Y will be the other for now. Then since we know xy = 72, we can solve for y, and now think of it as (72/x). Our other piece of information yields the equation: X + y = -42. We can only solve for one variable at a … Read more
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When changing a decimal to a fraction, it helps to read it aloud. 0.45 is "45 hundredths" which means the same thing as 45/100.  What remains is to reduce this fraction if possible; that is, try to find a common factor between both the numerator and denominator and divide each by that factor.  Here, 45 … Read more