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Diano4ka-milaya [45]
3 years ago
11

X^{2} -25=0 Please help meeee

Mathematics
2 answers:
-BARSIC- [3]3 years ago
8 0

Answer:

x=5,x=-5

Step-by-step explanation:

x^2-25=0

Add 25 to both sides:

x^2-25+25=0+25

x^2=25

Square root both sides:

x=\sqrt{25},\:x=-\sqrt{25} (Since a negative number multiplied by itself gives positive, there are two answers.)

x=5,x=-5

tekilochka [14]3 years ago
6 0

Hey there!

<h3>ANSWER: x=5\\x=25</h3><h2>EXPLANATION:</h2>

x^2-25=0

The first step we have to do is to add 25 to both sides of the equation.

x^2-25+25=0+25\\\text {equals }x^2=25

In our last and final step, we will have to take the square root.

x= ±\sqrt{25}

We have two answers.

x=5(ANSWER)\\x=-5(ANSWER)

Hope this helps!

\text {-TestedHyperr}

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Secants AC and DB intersect at point E inside the circle. Given that the measure of arc CD = 40o, arc AB = 60o, and arc BC = 160
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Answer:

C. 130^{\circ}

Step-by-step explanation:

Please find the attachment.

We have been given that secants AC and DB intersect at point E inside the circle. Given that the measure of arc CD = 40^o, arc AB = 60^o, and arc BC = 160^o. We are asked to find the measure of angle AED.

We know that the measure of angle formed by two intersecting secants is half the sum of measure of the arcs by intercepted by the angle and its vertical angle.    

\angle AED=\frac{\widehat{BC}+\widehat{AD}}{2}

Let us find measure of arc AD by subtracting measure of given arcs from 360 degrees as:

\widehat{AD}=360^{\circ}-(60^{\circ}+40^{\circ}+160^{\circ})

\widehat{AD}=360^{\circ}-(260^{\circ})

\widehat{AD}=100^{\circ}

\angle AED=\frac{160^{\circ}+100^{\circ}}{2}

\angle AED=\frac{260^{\circ}}{2}

\angle AED=130^{\circ}

Therefore, measure of angle AED is 130 degrees and option C is the correct choice.

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3 years ago
It takes a car 2.5 h to go from mile marker 15 to mile marker 130. What is the average speed of the car?
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3000   600

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Step-by-step explanation:

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