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3 years ago

12

1. Solve for x and y

1 answer:

SVETLANKA909090 [29]3 years ago

5 0

Answer:

I am sorry to say this I don't no the answer

pls sorry and pls make me a brainiest and follow me

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The table below provides some information about students at a certain college. Find the probability that a student selected at r

faltersainse [42]

Wait so what is your question

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3 years ago

7 (-2) - 15 =<br><br> Find the value of the expression.

spin [16.1K]

Answer:

-29?

Step-by-step explanation:

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3 years ago

Read 2 more answers

Dada la ecuacion 25x2 + 4y2 = 100, determina las coordenadas de los vertices, focos, las longitudes de los respectivos ejes mayo

Likurg_2 [28]

Answer:

The given equation is

$25x^{2} +4y^{2}=100$

Which represents an elipse.

To find its elements, we need to divide the equation by 100

$\frac{25x^{2} +4y^{2} }{100} =\frac{100}{100} \\\frac{x^{2} }{4} +\frac{y^{2} }{25} =1$

Where $a^{2} =25$ and $b^{2}=4$ . Remember that the greatest denominator is $a$ , and the least is $b$ . So, we extract the square root on each equation.

$a=5$ and $b=2$ .

In a elipse, we have a major axis and a minor axis. In this case, the major axis is vertical and the minor axis is horizontal, that means this is a vertical elipse.

The length of the major axis is $2a=2(5)=10$ .

The length of the minor axis is $2b=2(2)=4$ .

The vertices are $(0,5);(0,-5)$ and $(2,0);(-2,0)$ .

Now, the main parameters of an elipse are related by

$a^{2}=b^{2} +c^{2}$ , which we are gonna use to find $c$ , the parameter of the focus.

$c=\sqrt{a^{2}-b^{2} }=\sqrt{25-4}=\sqrt{21}$

So, the coordinates of each focus are $(0,\sqrt{21})$ and $(0,-\sqrt{21})$

The eccentricity of a elipse is defined

$e=\frac{c}{a}=\frac{\sqrt{21} }{5} \approx 0.92$

The latus rectum is defined

$L=\frac{2b^{2} }{a}=\frac{2(4)}{5} =\frac{8}{5} \approx 1.6$

Finally, the graph of the elipse is attached.

7 0

3 years ago

The value of varies directly with x. when y = 7.5 , x = 5. what is the value of y when x = 80?

AfilCa [17]

Answer:

x=120

$7.5 = 5 \\ x = 80 \\ \frac{5x}{5} = \frac{600}{5} \\ x = 120$

4 0

3 years ago

Choose the correct bar graph that best represents the basketball team's score data.

DENIUS [597]

Answer:

3 6 9 10 11 13

Step-by-step explanation:

the first point was a 3 pointer the other was a 3 pointer and the other one was and the rest we 1 pointer

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3 years ago