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sergij07 [2.7K]
3 years ago
7

What is the equation of this circle in standard form?

Mathematics
2 answers:
viktelen [127]3 years ago
4 0
I hope this helps you

GuDViN [60]3 years ago
3 0

Answer:

Standard equation of circle:

(x-\frac{11}{2})^2+(y-4)^2=12.25

Step-by-step explanation:

Given: Ends points of diameter are M(2,4) and N(9,4)

Mid point of M and N is center of circle.

Let center of circle be O(h,k)

Using mid point formula:

[tex[(x,y)\rightarrow (\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2})[/tex]

O(h,k)\rightarrow (\dfrac{2+9}{2},\dfrac{4+4}{2})

O(h,k)\rightarrow (\dfrac{11}{2},4)

Distance between O and M is radius of circle.

Let radius of circle be r

Using distance formula:

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2

r=\sqrt{(\dfrac{11}{2}-2)^2+(4-4)^2=3.5

Standard equation of circle:

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

Equation of required circle:

(x-\frac{11}{2})^2+(y-4)^2=3.5^2

(x-\frac{11}{2})^2+(y-4)^2=12.25

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Read 2 more answers
PLEASE HELP! Which ordered pairs are solutions to the inequality y-4x (greater than or equal to) -5? Select each correct answer
Wittaler [7]

(-2, 1), (-4, 2) and (1, -1) are solutions to given inequality y-4x (greater than or equal to) -5

<u>Solution:</u>

Given, inequality is y – 4x ≥ - 5

We have to find the correct answers from given options

<em><u>We have to check option by option. </u></em>

Now, (-2, 1) ⇒ 1 – 4(-2) ≥ - 5 ⇒ 1 + 8 ≥ -5 ⇒ 9 ≥ -5 ⇒ correct answer.

Now, (-4, 2) ⇒ 2 – 4(-4) ≥ -5 ⇒ 2 + 16 ≥ - 5 ⇒ 18 ≥ - 5 ⇒ correct answer

Now, (1, -1) ⇒ -1 – 4(1) ≥ - 5 ⇒ -1 – 4 ≥ - 5 ⇒ -5 ≥ -5 ⇒ correct answer

Now, (4, 0) ⇒ 0 – 4(4) ≥ - 5 ⇒ -16 ≥ -5 ⇒ wrong answer

Now, (5, -2) ⇒ -2 – 4(5) ≥ - 5 ⇒ -2 – 20 ≥ -5 ⇒ -22 ≥ -5 ⇒ wrong answer

Hence, (-2, 1), (-4, 2) and (1, -1) are solutions to given inequality.

8 0
2 years ago
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