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koban [17]
3 years ago
14

Find the value of r r/10=18/30

Mathematics
1 answer:
storchak [24]3 years ago
3 0
R/10 = 18/30
30r = 180
r = 6
The value of r is 6
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How many solutions does the system have?
kramer

Answer:

B. No solutions

Step-by-step explanation:

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Rewrite the first equation below. Then, divide both sides of the second equation by 3 and write it below the first equation.

y = -3x + 9

y = -3x + 3

Now look at the two equations. They are both written in the slope-intercept form, y = mx + b, where m = slope, and b = y-intercept. They have the same slope (m = -3) and different y-intercepts (9 and 3), so they are equations of two different lines, but since the slopes are the same, the lines are parallel. Since the lines never intersect, there is no solution.

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3 years ago
Find x and measurement of each side ..
elena55 [62]

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3 years ago
Please help and explain questions 20-22
zmey [24]
Hello!

The formula for circumference is 2\pi r and the formula for area of a circle is \pi r^{2}. Armed with these formulas, we can begin to find the circumferences and areas of the circles.

20. 
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The circumference of the circle is 40.8 in and the area of the circle is 132.7 in².

21.
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C = 15.7 \pi
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The circumference of the circle is 49.3 in and the area of the circle is 193.5 in².

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6 0
3 years ago
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3 years ago
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Step-by-step explanation:

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