3 years ago

In triangle ABC centroid D is on a median AM. AD=x+3 and DM=2X-5.Find AM AM=___

Mathematics

1 answer:

leonid [27]3 years ago

5 0

Answer:

x+5 = 2(2x-1)

x+5 = 4 x - 2

7 = 3 x

x = 7/3

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3 years ago

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15.12 is what percent of 12?

Llana [10]

Answer:

Step-by-step explanation:

$\bold{METHOD\ 1}\\\\\begin{array}{ccc}15.12&-&p\%\\\\12&-&100\%\end{array}\qquad\text{cross multiply}\\\\\\12p=(15.12)(100)\\12p=1512\qquad\text{divide both sides by 12}\\p=126$

$\bold{METHOD\ 2}\\\\p\%=\dfrac{p}{100}\\\\p\%\ of\ 12\ is\ equal\ to\ 15.12:\\\\\dfrac{p}{100}\cdot12=15.12\\\\\dfrac{12p}{100}=15.12\qquad\text{multiply both sides by 100}\\\\12p=1512\qquad\text{divide both sides by 12}\\\\p=126$