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Irina18 [472]
2 years ago
12

The distance around a circular track is 31.4 yards. What Is the radius of the track? Use 3.14 = π and round to the nearest tenth

s place
Mathematics
1 answer:
son4ous [18]2 years ago
5 0

Answer:

r=5

Step-by-step explanation:

Circumference of a circle =

Since w are given that the circumference of circle is 31.4 cm

So,

[tex5= r[/tex]

So, radius of given circle is 5 cm

Area of circle =

                      =

                      =

Thus the area of circle is 78.5 sq.cm.

Hence the radius of given circle is 5 cm and the area of the circle is 78.5 sq.cm.

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3x+2y=6 and y=-3/2x+5
love history [14]
In order to solve for parallel, perpendicular, or neither, you have to look at the slope.

If the slope is the same for both equations, it is most likely parallel.
If it's the reciprocal (Where you flip the number and add change the signs. For example, the reciprocal of 1/2 is -2)
If the slope is not the same or the reciprocal, then it is neither. 

So for the first equation, your slope is:
3x+2y=6
2y=-3x+6
y=-3/2x+3      The equation y=mx+b can help you here, where m is the slope.
Your slope is -3/2

For the second equation, your slope is -3/2 since y=-3/2x+5 is already in y=mx+b form and m is the slope.

Since both slopes are -3/2, then you have parallel equations!

(Be careful though, sometimes it will have the same slope but there will also be the same y-intercept. If that happens, it's no longer parallel, but it's the same equation. Such as y=-3/2x+1 and y=-3/2x+1. In this case there will be infinite solutions, but parallel equations have no solutions.)

I hope this helps!! Please ask if you have more questions!
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What is 5 1/4 - 3 3/4 = ?
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