A + b = c

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:

When a and b are both positive c will always be positive

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The standard divination of a set of data is 9.5 the mean is 205 what is the margin of error

skelet666 [1.2K]

Step-by-step explanation:

Margin of error = critical value × standard deviation

We aren't given the critical value or any information to calculate it, so we need to make some assumptions. Assuming the data set is large enough to be approximated as normal, and that the confidence level is 95%, then the critical value is 1.96.

ME = 1.96 × 9.5

ME = 18.62

You may choose to round 1.96 to 2, in which case the margin of error is:

ME = 2 × 9.5

ME = 19

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The figure below is a rhombus. What does Y equal?

Luba_88 [7]

Given data:

The angle of the rhomes = 124 degrees.

Subject: Calculate the value of Y.

We know the opposite angle of the rhombus are equal.

in triangle ABC,

sum of three angle = 180 degrees.

Angle DCA = angle CAB

Angle BCA = angle CAD,

Angle D = angle B,

$\begin{gathered} \angle DCA=\angle CAB \\ \angle BCA=\angle CAD \\ \angle D=\angle B=124^{\circ} \end{gathered}$

Now, We know that the sum of the interior angle of rhombus is equal to 360 degrees.

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