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antoniya [11.8K]
3 years ago
7

A trapezoid has two sets of parallel sides. always sometimes never

Mathematics
2 answers:
natulia [17]3 years ago
7 0
There is some disagreement whether parallelograms, which have two pairs of parallel sides, should be regarded as trapezoids. Some define a trapezoid as a quadrilateral having only one pair of parallel sides (the exclusive definition), thereby excluding parallelograms.

In other words, sometimes.
AveGali [126]3 years ago
6 0
The answer is never. In the definition of trapezoid is states ONE pair a parallel sides, called bases.
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2 years ago
How many liters each of a 35% acid solution and a 80% acid solution must be used to produce 60 liters of a 65% acid solution? (R
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<h3>How many liters of each solution do we need to use?</h3>

First, we need to define the variables:

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We know that we want to produce 60 liters of 65% acid, then we have the system of equations:

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To solve this we need to isolate one of the variables in one equation and then replace it in other one, isolating x we get:

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If £2000 is placed into a bank account that pays 3% compound interest per year,
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