All categories

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

You might be interested in

What is the distance between (-5, -6) and (-3,-8)?

Mashcka [7]

Answer:-2 and 2

Step-by-step explanation:

3 0

3 years ago

Answer plsss........

Alex Ar [27]

1. x+12

2. x-8

3. 3*x

4. x^(2)+5

5. (x/2)+7

6. 4*(x+6)

7. (1/2)*x

8. 2x+8

9. x^(2)+3

10. (x/3)+12

Additional activity

1. 2-50

2.20/4=5

3.100-50=50

4.three times two then add to four equals ten

5. the diffrence of eight and four

7 0

3 years ago

Last question on my assignment need help. Find x.

Umnica [9.8K]

Answer:

I think it would be 20 hope it helps and good luck

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

The cost of the tank and filter system is $280. The base of the tank is a square with a perimeter of 60 inches what is the side

Kaylis [27]

Answer:

The side length of of the base of the tank is 15 inches.

Step-by-step explanation:

We are given the following in the question:

Cost of the tank and filter system = $280

Perimeter of tank base = 60 inches

The perimeter of tank is in the shape of square.

We have to find the side length of the base of the tank.

Perimeter of tank base = Perimeter of square =

$P = 4a\\\text{where a is the side of square}\\60 = 4a\\\Rightarrow a = 15\text{ inches}$

Thus, the side length of of the base of the tank is 15 inches.

4 0

4 years ago

HELP is 3.31227766... a rational OR irrational number?

laila [671]

Answer:

irrational

hope this helps

have a good day :)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers