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STatiana [176]
3 years ago
7

Simplify the expression 2.75j + 2.25 - 1.5j + 3

Mathematics
1 answer:
Katarina [22]3 years ago
3 0
1.25j+5.25 would be the answer. just combine like terms
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Can someone please help me with this!!!!
balandron [24]
You can use the similarity approach of these two triangles CBD and CAE

as a result:
\frac{BD}{AE} = \frac{10}{2x} = \frac{CD}{CE} = \frac{3x}{?}

so:
? = 6x^2 / 10 = 0.6 x^2

and the fact of:

"The segment connecting the midpoints of two sides of a triangle is parallel to the third side and equals its half length"

so:BD = 0.5 AE        10 = 0.5 * 2x        >>> x= 10


Back to:
? =0.6 x^2 = 0.6 * 10^2 = 0.6 * 100 = 60



A

Hope that helps
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