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velikii [3]
3 years ago
15

In 2010, the number of participants in a checkers tournament was 2.6x10^4 people. In 2013, the number of participants in a check

ers tournament was 5.2x10^5 people. By what factor did the number of participants increase from 2010 to 2013?
Mathematics
1 answer:
andrezito [222]3 years ago
6 0
10^4*2.6= 26000
10^5*5.2=520000
520000-26000
=494000
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478 × 965 in distributive property
kakasveta [241]
478(900) + 478(95)

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4 0
3 years ago
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Write the equation of the circle whose center is (-4,8) and has a diameter of 18
svetoff [14.1K]

Answer:

(x + 4)^2 + (y - 8)^2 = 81

or

(x + 4)^2 + (y - 8)^2 = 9^2 depending on how your teacher wants it written.

Step-by-step explanation:

The standard form for a circle is

(x + h)^2 + (y + k)^2 = r^2

r is the radius.

You are given the diameter

r = d/2

r = 18/2

r = 9

So you already have the right hand side of the equation

(x + h)^2 + (y + k)^2 = 9*2

(x + h)^2 + (y + k)^2 = 81

You basically have h and k as well. They come from the center point.

h = 4

k = - 8

So the equation of the circle (and the answer) is

(x + 4)^2 + (y - 8)^2 = 81

One question remains. Why do the x and y values change signs? If you know what the distance formula is, then what you are finding is the distance r of all points on the circle from the center of the circle.

It is the distance formula that is actually the formula for the circle.

6 0
3 years ago
What is 3a squared add 7 a
vfiekz [6]
The answer is:  " 9a² + 7a " .
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Note:    (3a)² + 7a = (3a)*(3a) + 7a = 9a² + 7a .
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3 0
3 years ago
Tomika uses 6 inches of wire to make a necklace and 3 inches of wire to make a bracelet.
enyata [817]

Answer:

3

Step-by-step explanation:

3x(6+3)=27, shed have 1 inch left over

7 0
3 years ago
Question 57 need help
prisoha [69]
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We already know 3 out of the 4 variables in the equations, in this case we are given the volume so we must work backwards.

The equation will look like this:
10 \frac{2}{3}    = h \times (1  \frac{1}{3} ) \times 4
First we must mulitpy 4 and 1 1/3 to get 16/3. The equation will now look like:
10 \frac{2}{3}  = h \times  \frac{16}{3}
Next divide 16/3 from h then from 10 2/3 to get :
2 = h
The height is 2ft. Finally multiply 2 by the number of hay barrels (8) placed upon each other becuase we're finding the height and you will get your answer of 16 ft in height.
8 0
3 years ago
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