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3 years ago

A total of 315

1 answer:

4 0

Let x be the number of tickets sold to adults and y the number sold to students:

x + y = 315. But we know that y was double x, then :
y = 2x

Plug the value of y (in the 1st equation) by 2x:
x+ 2x = 315
3x = 315
and x = 105 (which is the number of tickets sold to adults

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40%

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4 years ago

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3 years ago

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lys-0071 [83]

Answer:

$(x+1)^2 + (y- 3.5)^2 =64$

Step-by-step explanation:

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So, first find the mid point of diameter

Formula : $x=\frac{x_1+x_2}{2} , y=\frac{y_1+y_2}{2}$

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Substitute the values in formula

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To find length of diameter :

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$d=\sqrt{265}$

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Standard form of the equation of the circle : $(x -h)^2 + (y- k)^2 = r^2$

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$r=\frac{\sqrt{256}}{2}$

Equation of the circle : $(x+1)^2 + (y- 3.5)^2 =(\frac{\sqrt{256}}{2})^2$

Equation of the circle : $(x+1)^2 + (y- 3.5)^2 =64$

Hence the standard form of the equation of the circle with endpoints of a diameter at the points (7,2) and (-9,5) is $(x+1)^2 + (y- 3.5)^2 =64$

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