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omeli [17]
3 years ago
12

Find the radius of a circle whose area is 78.6 cm squared

Mathematics
2 answers:
vredina [299]3 years ago
7 0
Its 39.15
tell me if I'm wrong

kifflom [539]3 years ago
4 0
The radius is 4.99, im sure
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ILL MARK BRAINLIEST AND GIVE FREE POINTS<br><br><br> Solve the system y = -x + 7 and y = 0.5(x - 3)2
Varvara68 [4.7K]

Answer:

Point Form:

( 5 , 2)

Equation Form:

x = 5 , y = 2

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

8 0
2 years ago
What relationship between the circumference and the diameter is suggested by your observation?
TiliK225 [7]

Answer:

  The ratio of circumference to diameter is a constant

Step-by-step explanation:

The first line on the page tells you the relation: the ratio of the circumference to the diameter is about 3.14.

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Another way to say this is that the circumference is about 3.14 times the diameter.

4 0
3 years ago
CD is a line parallel to AB and passes through the point (3, 5).
Mrac [35]

Answer:

y=5/3x+b

Step-by-step explanation:

Supposing CD uses the equation y=mb (meaning CD passes through the origin) and passes through (3,5), we then know the slope if 5/3 and the y intercept is 0. We can then write CD's equation as y=5/3x+0, or just y=5/3x.

So if AB is parallel to CB, then their equation is y=5/3x+b, as we don't the y-intercept yet.

Thank you!

4 0
2 years ago
Martha works in a toy shop and earns $44 Per day. She earns an extra $2 for each toy she sells. If Martha wants to earn at least
Nikitich [7]

Answer: 18

Step-by-step explanation:

80 - 44 = 36

36 / 2 = 18

6 0
3 years ago
James is kayaking. He can row 3 mph in still water. If he can travel 6 miles downstream in the same amount of time that he can t
nekit [7.7K]

Answer: the speed of the current is 0.6 mph

Step-by-step explanation:

Let x represent the speed of the current.

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Time = distance/speed

Time taken to travel downstream is

6/(3 + x)

In the same amount of time, he can travel 4 miles upstream. Assuming he went against the current, it means that his total speed while travelling downstream is (3 - x). Time taken to travel upstream is

4/(3 - x)

Since the time is the same, then

6/(3 + x) = 4/(3 - x)

Cross multiplying, it becomes

6(3 - x) = 4(3 + x)

18 - 6x = 12 + 4x

4x + 6x = 18 - 12

10x = 6

x = 6/10

x = 0.6 mph

4 0
3 years ago
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