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Brums [2.3K]
3 years ago
10

The area of a circle is 4​ pi square kilometers. what is the radius?

Mathematics
1 answer:
Rasek [7]3 years ago
6 0
Can you type that again?
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Please help real quick ​
malfutka [58]

Divide total km by the km in the scale:

112 / 16 = 7

The answer is A. 7 cm

6 0
3 years ago
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2x-7/3-5x+4/5=-x-4/30
Strike441 [17]

Answer:

Exact form: -7/10

Decimal form: -0.7

Step-by-step explanation:

Isolate the variable by dividing each side by by factors that don't contain the variable.

5 0
2 years ago
How many times can 66 go into 648
insens350 [35]

Answer:

9

Step-by-step explanation:

7 0
3 years ago
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How do I solve this equation
Anestetic [448]
-x - y = 8
2x - y = -1

Ok, we are going to solve this in 2 parts.  First we have to solve for one of the variables in one of the equation in terms of the other variable.  I like to take the easiest equation first and try to avoid fractions, so let's use the first equation and solve for x.

-x - y = 8      add y to each side
-x = 8 + y      divide by -1
x = -8 - y

So now we have a value for x in terms of y that we can use to substitute into the other equation.  In the other equation we are going to put -8 - y in place of the x.

2x - y = -1
2(-8 - y) - y = -1      multiply the 2 through the parentheses
-16 - 2y - y = -1      combine like terms
-16 - 3y = -1            add 16 to both sides
-3y = 15                   divide each side by -3
y = -5

Now we have a value for y.  We need to plug it into either of the original equations then solve for x.  I usually choose the most simple equation.

-x - y = 8
-x - (-5) = 8            multiply -1 through the parentheses
-x + 5 = 8                subtract 5 from each side
-x = 3                      divide each side by -1
x = -3

So our solution set is

(-3, -5)

That is the point on the grid where the 2 equations are equal, so that is the place where they intersect.

4 0
3 years ago
Pls help me almost due
iVinArrow [24]

Answer: disagree its backwards

Step-by-step explanation: the x intercept always comes first so its actually (-4,2)

6 0
2 years ago
Read 2 more answers
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