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olga55 [171]
3 years ago
8

In a certain year, 20% o RSM AMC 10 participants were invited to compete in American Invitational Mathematics Examination. How m

any RSM students participated in AMC 10 that year if 153 of them were invited to take part in AIME
Mathematics
1 answer:
Digiron [165]3 years ago
5 0

Answer:

765 students

Step-by-step explanation:

x- total number of students

20% of x=153

20/100=153/x

20x=15300

x=765

Therefore, 765 students

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Write the equation of the ellipse with foci at (-2,2) and (4,2) and major axis of length 10 *
Luda [366]

Answer:

The answer to your question is   \frac{(x - 1)^{2}}{25} + \frac{(y - 2)^{2}}{16} = 1          

Step-by-step explanation:

Data

Foci  (-2, 2)  (4, 2)

Major axis = 10

Process

1.- Plot the foci to determine if the ellipse is vertical or horizontal. See the picture below.

From the graph we conclude that it is a horizontal ellipse.

2.- Determine the foci axis (distance between the foci)

                  2c = 6

                    c = 6/2

                    c = 3

3.- Determine a

                  2a = 10

                    a = 10/2

                    a = 5

4.- Determine b using the Pythagorean theorem

                   a² = b² + c²

-Solve for b

                   b² = a² - c²

                   b² = 5² - 3²

                   b² = 25 - 9

                   b² = 16

                   b = 4

5.- Find the center (1, 2)  From the graph, it is in the middle of the foci

6.- Find the equation of the ellipse

                      \frac{(x - 1)^{2}}{5^{2}} + \frac{(y - 2)^{2}}{4^{2}} = 1

                       \frac{(x - 1)^{2}}{25} + \frac{(y - 2)^{2}}{16} = 1                

3 0
3 years ago
Share £747 in the ratio 2:7 between tom and Ben. Tom will get <br> Ben will get
Olenka [21]
Add the ratio:
2+7=9
747 divided by 9 = 83

Tom -
2x83 = £166

Ben -
7x83= £581
7 0
3 years ago
What is the answer?????
KiRa [710]

Answer:

x = 9

Step-by-step explanation:

2 sides are 4 less than x, that is x - 4

The perimeter is the sum of all 3 sides, thus

x + x - 4 + x - 4 = 19, that is

3x - 8 = 19 ( add 8 to both sides )

3x = 27 ( divide both sides by 3 )

x = 9

8 0
3 years ago
Line g bisects line segment BC at Point H. BH = 4x and HC = 24. Find BC.
Misha Larkins [42]
Answer: The last choice is correct
The function is a parabola U-shaped up... so it's vertex y-value is the lowest y-value of the function.
<span>The inverse would just be the switching of the domain and range</span>
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4 years ago
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Which geographic feature was common to the development of civilizations in ancient Egypt, China, India, and Mesopotamia?
storchak [24]
The answer is probably D 
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