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bulgar [2K]
3 years ago
9

-3r-8(8r+8)=-9(-4+9r)​

Mathematics
1 answer:
natulia [17]3 years ago
8 0

Answer:

r= 7.14 (rounded to 2 decimal places)

Step-by-step explanation:

We have to solve this equation for the value of r. We will use distributive property and basic algebra to solve this.

Distributive property is  a(b+c) = ab + ac

Now, the steps of solving are shown below:

-3r-8(8r+8)=-9(-4+9r)\\-3r -64r-64=36-81r\\-67r-64=36-81r\\-67r+81r=36+64\\14r=100\\r=\frac{100}{14}\\r=7.14

Hence, value of r is 7.14 (rounded to 2 decimal places)

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The equation of the circle shown is:

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<h3>What is the equation of a circle?</h3>

The equation of a circle of center (x_0, y_0) and radius r is given by:

(x - x_0)^2 + (y - y_0)^2 = r^2

From the graph, it can be seen that the center of the circle is (0,0), thus (x_0, y_0) = (0,0) and the radius is of r = 10, hence the equation is:

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You can learn more about the equation of a circle at brainly.com/question/24307696

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2 years ago
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