Find the difference. (k2−7k+2)−(k2−12)

On a coordinate plane, a circle has a center at (8, 9). Concentric circles are circles with the same center but different radii.

slega [8]

Answer:

Correct options:

(x – 8)² + (y – 9)² = 3

(x – 8)² + (y – 9)² = 14

Step-by-step explanation:

If the circle has a center at (8,9), the equation for this circle is:

$(x-8)^2 + (y - 9)^2 = r^2$

All concentric circles have the same center, so their equations need to have the same left side of the equation above.

-> x2 + y2 = 25

This circle has a center at (0,0), so it's not concentric to our circle.

-> (x – 8)² + (y – 9)² = 3

This circle has a center at (8,9), so it's concentric to our circle.

-> (x – 8)² + (y – 9)² = 14

This circle has a center at (8,9), so it's concentric to our circle.

-> (x – 8)² + (y + 9)² = 3

This circle has a center at (8,-9), so it's not concentric to our circle.

-> (x + 8)² + (y + 9)² = 25

This circle has a center at (-8,-9), so it's not concentric to our circle.

-> (x + 9)² + (y + 8)² = 3

This circle has a center at (-8,-9), so it's not concentric to our circle.

Correct options:

(x – 8)² + (y – 9)² = 3

(x – 8)² + (y – 9)² = 14

3 0

3 years ago

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James and Martina each read

o-na [289]

Answer:

148 books

Step-by-step explanation:

3 0

3 years ago

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A 24 hour digital watch shows 19:29:00 on its face. The first two digitals adicate

liraira [26]

Answer:

271

Step-by-step explanation:

4 hours and 31 minutes = 240 + 31 = 271 minutes

8 0

3 years ago

Can someone help? Find the mean of the data in the bar chart below.

KatRina [158]

Answer:

b

Step-by-step explanation:

8 0

3 years ago

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How do you find the cube root

zvonat [6]

Use a calculator to find the cube root of positive or negative numbers. Given a number x, the cube root of x is a number a such that a3 = x. If x positive a will be positive, if x is negative a will be negative. Cube roots is a specialized form of our common radicals calculator.

Example Cube Roots:The 3rd root of 64, or 64 radical 3, or the cube root of 64 is written as $ \sqrt[3]{64} = 4 $.The 3rd root of -64, or -64 radical 3, or the cube root of -64 is written as $ \sqrt[3]{-64} = -4 $.The cube root of 8 is written as $ \sqrt[3]{8} = 2 $.The cube root of 10 is written as $ \sqrt[3]{10} = 2.154435 $.

The cube root of x is the same as x raised to the 1/3 power. Written as $ \sqrt[3]{x} = x^{\frac{1}{3}} $. The common definition of the cube root of a negative number is that 
(-x)1/3 = -(x1/3).[1] For example:

The cube root of -27 is written as $ \sqrt[3]{-27} = -3 $.The cube root of -8 is written as $ \sqrt[3]{-8} = -2 $.The cube root of -64 is written as $ \sqrt[3]{-64} = -4 $.

This was not copied from a website or someone else. This was from my last year report.


f -64, or -64 radical 3, or the cube root of -64 is written as $ \sqrt[3]{-64} = -4 $.The cube root of 8 is written as $ \sqrt[3]{8} = 2 $.The cube root of 10 is written as $ \sqrt[3]{10} = 2.154435 $.

The cube root of x is the same as x raised to the 1/3 power. Written as $ \sqrt[3]{x} = x^{\frac{1}{3}} $. The common definition of the cube root of a negative number is that 
(-x)1/3 = -(x1/3).[1] For example:

The cube root of -27 is written as $ \sqrt[3]{-27} = -3 $.The cube root of -8 is written as $ \sqrt[3]{-8} = -2 $.The cube root of -64 is written as $ \sqrt[3]{-64} = -4 $.

6 0

3 years ago