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Leokris [45]
3 years ago
6

To the nearest square centimeter, what is the area of the circle below? Use pi = 3.14

Mathematics
2 answers:
Mademuasel [1]3 years ago
8 0

Answer:

radius \:  \: r = 5 \: cm \\ area = \pi {r}^{2}  \\  = 3.14 \times (5) {}^{2}  \\  = 78.5 \:  {cm}^{2}

Neko [114]3 years ago
8 0

Answer:

78.5cm^{2}

Step-by-step explanation:

A=\pi r^{2}

A=(\pi )(5)^{2}

A=78.5

so I guess rounding it to 79

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the ratio of red to blue to green marbles is 3:10:4 if there are 39 red and blue marbles altoghether how many green marbles are
Alla [95]

Answer:

3r 10b 4g

red + blue = 39

there are 9 red marbles and 30 blue marbles

green marbles = 30 * 4 / 10 = 12

 

Step-by-step explanation:

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2 years ago
Solve one step equation <br><br><br> x/4 = 16
Tpy6a [65]

Hi there!

Since this is a one-step equation, we can solve it in one step.

This step is multiplying both sides by 4 to isolate x:

x=16*4

x=64

Therefore, x=64.

Hope it helps!

~GracefulGirlie

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3 years ago
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Alex_Xolod [135]

Answer:

D. \frac{\sqrt{20}}{5}

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3 years ago
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a line goes through the point(6,-2)and has a slope of -3 what is the value of a if the point (a,7) lies on the line​
yaroslaw [1]

Answer:

The value of a is "3", to complete the coordinate point (3,7) on the line.

Step-by-step explanation:

We are given the slope of the line, and also one point through which the line passes. Therefore, we can find the actual equation of the line by using the slope-point form of the line:

y-y_0=m(x-x_0)\\y-(-2)=(-3)(x-6)\\y+2=-3x+18\\y=-3x+18-2\\y=-3x+16

Now, we need to find which value of "x" renders a y-value of "7", to complete the coordinate pair (a, 7) as requested. Therefore, we ask for the y-value in the previous equation to be "7", and solve for its associated x-value:

y=-3x+16\\7=-3x+16\\7-16=-3x\\-9=-3x\\x=\frac{-9}{-3} \\x=3

Therefore, x = 3

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3 years ago
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sweet [91]
I just took the test it's
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