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3 years ago

I’ll give brainiest :) pls help ASAP

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

7 0

Answer:

10⁷ is the correct answer of the question

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Use completing the square to rewrite the equation in the form (x-h)^2 +(y-k)^2 = r^2. State the center (h, k) and radius r of th

Lisa [10]

Answer:

The equation is (x + 1)^2 + (y + 2)^2 = 15

Center is at (-1, -2) and radius = √15

Step-by-step explanation:

2x^2 + 2y^2 + 4x + 8y - 20 = 0

Divide through by 2:-

x^2 + y^2 + 2x + 4y - 10 = 0

x^2 + 2x + y^2 + 4x = 10

Completing the square on the x and y terms:-

(x + 1)^2 - 1 + (y + 2)^2 - 4 = 10

(x + 1)^2 + (y + 2)^2 = 10 + 1 + 4

(x + 1)^2 + (y + 2)^2 = 15

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4 years ago

Use scientific notation to estimate the number of hours in one year

Studentka2010 [4]

8.76582 × 10 to the 3rd power, that's how many hours there are in a year using scientific notation.

4 0

4 years ago

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5x + 900 = 1100<br> What is X?<br> My last question.

Elenna [48]

Answer:

x = 40

Step-by-step explanation:

5x + 900 = 1100

=> 5x = 1100 - 900

=> 5x = 200

=> x = 40

Hoped this helped.

8 0

2 years ago

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Two friends compete with each other and five other, equally good, violinists for first and second chair in an orchestra, in a bl

Darina [25.2K]

Answer: 0.0476

Step-by-step explanation:

Given : Two friends and 5 other people compete with each other for first and second chair in an orchestra.

Total people in this competition= 2+5=7

By permutation , Number of ways to arrange 7 people= 7!

Also, number of ways for two friends end up as first and second chair together= 2 × 5! [ 2 ways to arrange friends on first and second chair and 5! ways to arrange others]

I.e. Required probability = $\dfrac{2\times5!}{7!}$

$=\dfrac{2!\times5!}{7\times6\times5!}\\\\=\dfrac{1}{7\times3}\\\\=\dfrac{1}{21}\\\\=0.0476$

Hence, the probability that the two friends end up as first and second chair together = 0.0476

4 0

4 years ago

Help me plz due today

Nostrana [21]

49.10 = 5 + 2.10 * x

x = 21

5 0

3 years ago