F(x)

True or false: spheres have diameters and radii.

anygoal [31]

True: Spheres have diameters and radii. The diameter of a sphere is found by multiplying the radii times 2.

8 0

3 years ago

Please help me with 1a, thanks

valkas [14]

Since 1A claims that the diagram is of a square, you can easily find the perimeter by multiplying just one side by 4, because the definition of a square says that all of its four sides are equal in length.

Take the left side, x and 4, and add them together, because both of these lengths add up to form the side of the square. You have found one side of the square, x + 4. Now multiply this side by 4 for the perimeter.

Perimeter is the length all around the figure, and since a square has 4 sides you would multiply one side by 4 to find the perimeter.

4(x + 4) is your expression for the perimeter of the square. You could probably solve 1B and 1C by substituting in 3 and 5 for x in the equation I've given you :)

8 0

2 years ago

Read 2 more answers

The median size of a new single family home grew from 1727 ft^2 in 1996 to 2129 ft^2 in 2009. What is the percent of increase?

pishuonlain [190]

(2129-1727)/1727=0.232
The percentage of increase is 23%.

6 0

3 years ago

Calculate the variance of the following set of data. 3, 33, 303, 233, 3, 73, 83, 63

andrew-mc [135]

Answer:

12083.929

Step-by-step explanation:

First step: find the mean of the data.

mean = 3+33+303+233+3+73+83+63

8

= 794

8

= 99.25

Second step: Now we calculate each dog's difference from the Mean.

Example : 3–99.25=96.25

Answer: (-96.25)+(-66.25)+203.75+133.75+(-96.25)+(-26.25)+(-16.25)+(36.25)

Third step: To calculate the Variance, take each difference, square it, and then average the result.

s² = (-96.25)²+(-66.25)²+203.75²+133.75²+(-96.25)²+(-26.25)²+(-16.25)²+(36.25)²

8–1

= 9264.063+4389.063+41514.063+17889.063+9264.063+689.063+264.063+1314.063

7

= 84587.5

7

= 12083.929

Variance Formula:

Variance = s² =Σ(xi− x )²

n−1

4 0

3 years ago

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How many rives usa has

Mandarinka [93]

The USA has 250,000 rivers

7 0

3 years ago