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3 years ago

LM is the midsegment of trapezoid ABCD. AB= x + 8, LM = 4x + 3, and DC = 187. What is the value of x?

Mathematics

1 answer:

beks73 [17]3 years ago

5 0

$\frac{|DC|+|AB|}{2}=|LM|\\\\|AB|=x+8;\ |LM|=4x+3;\ |DC|=187\\\\substitute:\\\\\frac{187+x+8}{2}=4x+3\ \ \ \ /\cdot2\\\\195+x=8x+6\ \ \ /-195;\ /-8x\\\\-7x=-189\ \ \ /:7\\\\\underline{\underline{x=27}}$

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Dmitry [639]

Answer:

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So r is about 6%.

Step-by-step explanation:

So we are given:

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Most likely we are asked to round to a certain place value.

I'm going to put my value for r into my calculator.

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Rounding to nearest hundredths gives us r=0.06.

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4 years ago