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3 years ago

3. Which of the following equations has a center of (-4,7) and a diameter of 18?

Mathematics

1 answer:

sukhopar [10]3 years ago

8 0

Answer:

option 4

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Here (h, k) = (- 4, 7) and r = 18 ÷ 2 = 9 , then

(x - (- 4) )² + (y - 7)² = 9² , that is

(x + 4)² + (y - 7)² = 81

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Find the length of the darkened arc. Leave your answer in terms of pi.

jonny [76]

Answer:

$\frac{15 }{4} \pi \:$

Step-by-step explanation:

Radius of circle (r) = 18/2 = 9 ft

Central angle = 180° - 30° = 150°

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3 years ago

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Step-by-step explanation:

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Which of the following is the multiplicative inverse of 9y/7x?

Natali [406]

<span>C. 7x/9y is the correct answer.
</span>

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3 years ago

Solve the compound inequality 7x > –35 and 3x ≤ 30.

docker41 [41]

Answer:

x>-5 x ≤10

Step-by-step explanation:

-35/7=-5

7x/7=x

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2 years ago

Please help Evaluate this equation!!

lozanna [386]

Answer:

1.)-8

2.)-5

3.)4

Step-by-step explanation:

So, the function f(x)=3x-5

The questions say "If you were to substitute these numbers what answer would you get?"

Understanding this,

First question is with x=-1

f(-1)=3(-1)-5

f(-1)=-3-5=-8

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f(0)=3(0)-5

f(0)=0-5=-5

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f(3)=3(3)-5

f(3)=9-5=4

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2 years ago