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Rashid [163]
3 years ago
8

A circle is centered at (0,0) and passes through (-3,0) and (3,0) in the standard (x,y) coordinate plane. A square is inscribed

in the circle. What is the perimeter of the square?
A. 9
B. 12
C. 6√2
D.12√2
E. 18
Mathematics
1 answer:
myrzilka [38]3 years ago
3 0

Answer:

D)

Step-by-step explanation:

First we want to find the diameter of the circle, since we are only given coordinates we have to find the distance between these points this gives us the diameter.

| -3 + 3 | = 6 (|| = positive value)

The diameter is 6 now we can draw a inscribed square with each corner touching the circumference of the circle at 0,90,180,and 360 degrees.

To find the length of one side we have to use the radius of the circle with Pythagorean theorem.

3^2 + 3^2 = c^2 ; 18=c^2

sqrt = square root

Then square root both sides; sqrt(18) = sqrt(c^2)


sqrt(9) * sqrt(2) = sqrt(c^2) ; 3*sqrt(2) = c

This is one length to find the others we just multiply by four since the sides length of a square are all the same as each other. 4*(3*sqrt(2)) = Perimeter

12*sqrt(2)


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A deli is offering two specials. The roast beef special gives a profit of $2.30 per sandwich, and the turkey special gives a pro
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Answer:

The constraints are as follows;

1) 2·x + 2·y ≤ 120

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Step-by-step explanation:

The question is a word problem, with the analysis as follows;

The profit from the roast beef special per sandwich = $2.30

The profit from the turkey special per sandwich = $3.10

The number of slices of bread in the roast beef special = Two slices

The number of slices of cheese in the roast beef special = Three slices

The number of slices of bread in the turkey special = Two slices

The number of slices of cheese in the turkey special = Four slices

The number of slices of bread the deli has  = 120 slices

The number of slices of cheese the deli has = 160 slices

Let 'x' and represent the number of roast beef special and 'y' represent the number of turkey special the deli makes, then we have the constraints as follows;

For the number of slices of bread used;

2·x + 2·y ≤ 120...(1)

For the number of slices of cheese used;

3·x + 4·y ≤ 160...(2)

x = 2.30

y = 3.10

The profit 'P' is given by the following equation

P = 2.3·x + 3.10.

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Step-by-step explanation:

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