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3 years ago

The angle bisector of ∠ACD in rhombus ABCD makes a 64° angle with the diagonal BD . Find the measure of ∠BAD.

Mathematics

1 answer:

kondor19780726 [428]3 years ago

4 0

∠BAD=2[180-(90+64)]=2*26°=52°
Please see the figure below.

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Butoxors [25]

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Step-by-step explanation:

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3 years ago

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Jane has a pre-paid cell phone with Splint. She can't remember the exact costs, but her plan has a monthly fee and a charge for

yan [13]

Answer:

The costs of the plan are $0.15 per minute and a monthly fee of $39

Step-by-step explanation:

Let

x ----> the number of minutes used

y ----> is the total cost

step 1

Find the slope of the linear equation

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have the ordered pairs

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substitute

$m=\frac{138-54}{660-100}$

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step 2

Find the equation of the line in point slope form

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we have

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substitute

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step 3

Convert to slope intercept form

Isolate the variable y

$y-54=0.15x-15\\y=0.15x-15+54\\y=0.15x+39$

therefore

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6 0

3 years ago

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sasho [114]

Answer: B

Hope this helps :)

5 0

3 years ago

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ira [324]

12) Angle ACD= Angle ABC+ Angle CAB ====> You MAY end here
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13) Angle ABC+ Angle BAC= Angle ACD====> You MAY end here
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3 years ago

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3 years ago