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anzhelika [568]
3 years ago
12

12+20/x = 10 solve for x

Mathematics
1 answer:
weeeeeb [17]3 years ago
5 0

Answer: x=−10   ..,.,.,.,.,.,.,..,.,.,

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Work out the area of a semi circle with a radius of 3cm<br> give your answer in terms of pi
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<h3>The area of semicircle is 4.5 \pi\ cm^2</h3>

<em><u>Solution:</u></em>

Given that,

We have to find the area of a semi circle with a radius of 3 cm

<em><u>The area of semicircle is given as:</u></em>

Area\ of\ semicircle = \frac{ \pi r^2}{2}

Where, r is the radius

From given,

r = 3 cm

<em><u>Substituting the values we get,</u></em>

Area\ of\ semicircle = \frac{ \pi \times 3^2}{2}\\\\Area\ of\ semicircle = \frac{ \pi \times 9}{2}\\\\Area\ of\ semicircle = 4.5 \pi

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4 0
4 years ago
Which is an equation for the line that contains (-2,5) and has a slope of -7 ?
Misha Larkins [42]

Answer:

<h3>y = -7x - 9</h3>

Step-by-step explanation:

The standard from of equation of a line is expressed as;

y = mx+c

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c is the intercept

Get the intercept by substituting m = -7 and the point (-2, 5) into the equation;

y = mx+c

5 = -7(-2) + c

5 = 14 + c

c = 5-14

c = -9

Substitute m = -7 and c = -9 into the expression y = mx+c

y = -7x - 9

Hence the required equation of the line is y = -7x - 9

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