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jek_recluse [69]
3 years ago
14

If the diameter of a circle is 8 centimeters, the circumference would be about _______________________ centimeters.

Mathematics
1 answer:
Amanda [17]3 years ago
8 0
25.14... i need 20 characters so
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Solve the following formula for the indicated variable.<br> – 5x – 3y = 13: solve for y.
SashulF [63]

9514 1404 393

Answer:

  y = -5/3x -13/3

Step-by-step explanation:

In any "solve for ..." problem, it is useful to start by identifying where the target is and what has been done to it. Here, y is in one term on the left side of the equation and it has had these things done to it:

  • multiply by -3
  • add -5x

We want to undo these in reverse order. We undo addition by adding the opposite. We undo multiplication by multiplying by the reciprocal (equivalently, dividing). <em>Whatever we do to one side of the equation, we must also do to the other side</em>.

So, first we add the opposite of -5x to both sides of the equation.

  -5x +5x -3y = 13 +5x

  -3y = 13 +5x . . . . . . . . . collect terms

Next, we undo the multiplication by -3. We can do that by multiplying both sides by 1/(-3) = -1/3.

  (-1/3)(-3y) = (-1/3)(13 +5x)

  y = -5/3x -13/3 . . . . . also we rearranged the terms to standard form

3 0
3 years ago
Use the value of the linear correlation coefficient r to find the percentage of the total variation that can be explained by the
Pie

Answer:

5.47% of the total variation between the two variables can be explained by the regression line.

Step-by-step explanation:

Given :

R value = 0.234

The R value is the correlation Coefficient ; which gives the type and level of correlation between two variables.

However, to Obtian the percentage variation which can be explained by by the regression line, we have to obtain the Coefficient of determination, R².

R² value is Obtained by taking the squared of the correlation Coefficient

Hence,

R² = 0.234² = 0.054756

R² = 0.05476 * 100% = 5.4756%

Hence, R² = 5.48%

This is interpreted as ; 5.47% of the total variation between the two variables can be explained by the regression line.

4 0
3 years ago
2n - 3 = 9 what does this equal
hoa [83]

Step-by-step explanation:

  • 2n-3=9

Adding 3 to both sides, we get

  • 2n-3+3=9+3
  • 2n=12

Dividing both sides by 2, we get

  • 2n/2=12/2
  • n=6
5 0
3 years ago
Read 2 more answers
Plz :(
Phoenix [80]

Answer:

B

Step-by-step explanation:

I just used a calculator and did the math

7 0
3 years ago
Read 2 more answers
What is the area of the trapezoid
kodGreya [7K]
The answer is c
The are of the trapezoid is c bc that’s the answer I got and it was right
4 0
4 years ago
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