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2 years ago

Write the equation in standard form. Identity the center and radius. x² + y2 + 8x-4y-7=0

Mathematics

1 answer:

Masteriza [31]2 years ago

3 0

Answer:

See below

Step-by-step explanation:

Given equation:

x² + y² + 8x - 4y - 7 = 0

Convert this to standard form by completing the square:

(x - h)² + (y - k)² = r², where (h, k) - center, r - radius
x² + 2*4x + 4² + y² - 2*2y + 2² - 16 - 4 - 7 = 0
(x + 4)² + (y - 2)² - 27 = 0
(x + 4)² + (y - 2)² = 27
(x + 4)² + (y - 2)² = (√27)²

The center is (- 4, 2) and the radius is √27

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2 years ago

Given the cost function, C(x), and the revenue function, R(x), find the number of units x that must be sold to break even C(x)=1

natka813 [3]

Consider these specific values of x.

For example, if x=10, then C(10)=16(10)+36,000=160+36,000=36,160 (say $)

and R(10)=18*10=180.

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If, for example, x=1000, then we can calculate

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This suggests that with higher values of x, we can get to a particular point where the Cost and Revenue are the same. To find this point, we set the equation:
C(x)=R(x),

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Answer: 18,000

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3 years ago

The process of using the same or similar experimental units for all treatments is called:______

Charra [1.4K]

Answer:

replicating

Step-by-step explanation:

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2 years ago

Help pls I'm gonna be screwed if you don't get this pls pls pls anyone who knows math well pls help me I'm gonna cry it's over d

erica [24]

Answer:

WRONG ALL

Step-by-step explanation:

3. Should be:

$- 4 \frac{7}{8} \times \frac{2}{3} \\ \\ - \frac{39}{8} \times \frac{2}{3} \\ \\ \frac{ -13}{4}$

4. Should be:

$- 3 \frac{1}{5} + - \frac{2}{3} \\ \\ - 3 \frac{3}{15} - \frac{10}{15} \\ \\ - 3 \frac{7}{15}$

I hope this helps you :)

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3 years ago

NO LINKS PLEASE HURRY I REALLY NEED HELP

Sidana [21]

Answer:

9/80

Step-by-step explanation:

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2 years ago