Find the value of x for which ABCD must be a parallelogram. Express your answer as a decimal.

2 answers:

Pie3 years ago

8 0

2x+7=12x-6
7=10x-6
13=10x
13/10=x

6 0

Answer:

X= 1.3

Step-by-step explanation:

If you need this to be a parallelogram, you need to found two pairs of parallel sides to be the same length.

The AB side has to be the same as the CD side.

So, to find x, you need to equal the two equations given, because both sides have to be the same.

$2x+7=12x-6$

To find x first put all X terms to one side of the equal and no X terms to the other side.

$7+6=12x-2x$

And you resolve

$13=10x\\13/10=x\\1.3=x$

So, to have a parallelogram, the value of X is 1.3

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mrs_skeptik [129]

x=0.2

y=2.4

$\frac{0.2}{2.4} \\$

5 0

3 years ago

gavmur [86]

Answer:

Step-by-step explanation:

both sides are the same length so 20+6x+3=18+7x+2

all you have to do is get the variables and non-variables on opposite sides of the equation so 3=x

5 0

3 years ago

inysia [295]

Using concepts of sample and population, it is found that the sample variance is representative of 362 and 5530 customers ages, option D.

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In sampling, the information is taken from a sample, and is used to estimate it for the whole population.

In this problem, we have a sample of 362 and a population of 5530 customers.
The sample variance $s^2$ is calculated from the sample, and used as an estimate for the population variance. Thus, it can be said that it represents both 362 and 5530 customers, and the correct option is D.