How to find the area and circumference of a circle given the radius or diameter

Answers

Answer 1

Answer: circumference = 2 × pi × radius
area = pi × radius^2

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What does 1/2 and 2/8 =
Explain why the value of k cannot be equal to 0
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Which one of the following equations illustrates the commutative property?A) 8 + 3 = 4 + 7 B) If 3 + 5 = a, then a=3+5 C) 2 + b = b + 2 D) 3(2 + 5) = 6 + 15

What is 3x+3=-27 what is x

Answers

Subtract 3 from each side:

3x = -30

Divide each side by 3 :

x = -10

$3x + 3 = -27 \n 3x = -27-3 = -30 \n x = -30/3 = -10 \n Thus, x = -10$

168 newspaper per week equal newspaper per hour ?

Answers

Final answer:

To calculate the number of newspapers per hour, divide the total number of newspapers in a week by the number of hours in a week.

Explanation:

To calculate the number of newspapers per hour, we need to know the number of hours in a week. There are 24 hours in a day and 7 days in a week, so there are 24 x 7 = 168 hours in a week. To find the number of newspapers per hour, we divide the total number of newspapers in a week by the number of hours in a week. In this case, 168 newspapers divided by 168 hours will give us 1 newspaper per hour.

Learn more about Newspapers per hour here:

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What is two x one half

Answers

2*1/2=1 because half or 2 is 1

$2* (1)/(2) = \frac {2}{2}=1$

Pranav made a nut mixture that contains 82% peanuts by mixing 6kg of mixed nuts with 9kg of peanuts. The mixed nuts contained what percent peanuts?

Answers

ok so
82%=82/100=0.82

82% of all =peanuts

total=6+9=15kg

all=15
0.82 times 15=peanuts
12.3=peanuts

12.3kg of peanuts total
9kgpeanuts+xkgpeanuts(inmixednuts)=12.3
subtract 9 from both sides
xkgpeanuts=3.3kg

3.3/9=x%
x%=x/100
3.3/9=x/100
1.1/3=x/100
multiply both sides by 300
110=3x
divide both sides by 3
36.6666=x
36.6666% is answer
aprox 37%

Are the graphs of the lines in the pair parallel? Explain.Find the slope of a line parallel to 5x + 2y = 6

Answers

To make it easier turn this equation into a slope. To do that you must get "y" by itself on one side of the equal sign. The "y" have to be positive. Then plot it out. Enter the "x" (1 for example) in the equation and solve to get "y". Then use the ordered pair to plot out the slope. Then you find a coefficient of "x" that matches the one in this equation and plot that out. If it's parallel then it's right. :)

The gradient of the line is - 2.5

The length of a rectangle is represented by (6x − 2), and the width is represented by (x − 1). Which expression best represents the area of the rectangle?

Answers

The are of a rectangle can be obtained by using the formula

A=L*W

Since we are already given with the L, which is (6x-2), and the width, which is (x-1), the area of the rectangle is then

A = (6x-2)(x-1)

which, upon further simplification will give us

A = 6x^2-2x-6x+2

Combining like terms will yield

A = 6x^2-8x+2

Hence, the area of the specified rectangle is represented by the expression 6x^2 -8x +2.

The expression for the area of the rectangle is 6x²-8x+2.