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Mathematics

2 answers:

zzz [600]3 years ago

7 0

Answer:

30 inches

Step-by-step explanation:

The circumference of a circle can be found by using 2 $\pi$ r, or $\pi$ * d.

Since we are given the circumference of the circle, 30 $\pi$ , you can find the diameter by solving for the diameter (after substituting in the circumference) in the formula for circumference.

$30\pi =\pi *d$

To cancel out $\pi$ you can divide both sides of the equation by pi. Now you have:

30 = d

Therefore the diameter of the circle is 30 inches.

soldi70 [24.7K]3 years ago

5 0

Answer:

Step-by-step explanation:

B! 30in

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What is the equation of the line that passes through the point (8, -4) and<br> has a slope of 1/2

Eva8 [605]

Answer:

$y = \frac{1}{2}x - 8$

Step-by-step explanation:

1. Approach,

For this problem, the format of a line that will be used is, slope-intercept form;

$y = mx + b$

Where ( $m$ ) is the slope of the line, also known as the change in the line and $(b)$ is the y-intercept, or where the graph of the line intersects the y-axis. Since, in this problem, the slope of the line is given, all one has to do is substitute in a point on the given line and solve.

2. Finding the equation,

In this problem, the slope of the line is given. Therefore, to solve this problem, all one has to do is substitute in a point on the given line and solve.

$y = mx + b$

Substitute in the slope,

$y = \frac{1}{2}x + b$