2 years ago

Why is circle 1 similar to circle 2?

Mathematics

1 answer:

Artemon [7]2 years ago

3 0

Circle 2 is a dial at ion of circle 1

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Kruka [31]

What’s the shape of it?
If it’s a rectangle 20
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3 years ago

How do I work out this problem

Alchen [17]

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3 years ago

Please teach me on how to answer this question. (addmath question)

arsen [322]

We know that $\overline{x}=8$ so:

$\overline{x}=8\\\\\\\dfrac{\sum\limits_{k=1}^7\,x_k}{7}=8\qquad|\cdot7\\\\\\ \boxed{\sum\limits_{k=1}^7\,x_k=56}$

We want to calculate:

$\sum\limits_{k=1}^7\,\big(2x_k-3\big)^2=\sum\limits_{k=1}^7\,\big(4x_k^2-12x_k+9\big)=\\\\\\=\sum\limits_{k=1}^7\,4x_k^2-\sum\limits_{k=1}^7\,\big12x_k+\sum\limits_{k=1}^7\,9=4\sum\limits_{k=1}^7\,x_k^2-12\sum\limits_{k=1}^7\,x_k+\sum\limits_{k=1}^7\,9=\\\\\\=4\cdot672-12\cdot56+7\cdot9=2688-672+63=\boxed{2079}$

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3 years ago

Mr. Robins earns a commission on each airfare he books. At the end of the day, he had booked $208.60 worth of airfare and earned

Marina86 [1]

Answer:

15%

Step-by-step explanation:

His rate is ...

rate = commission/sales · 100% = 31.29/208.60 · 100%

rate = 15%

Mr. Robins' commission rate is 15% of bookings.

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3 years ago

Read 2 more answers

EXPLAIN

zvonat [6]

Answer:

50,000? This is my answer sorry if wrong

Step-by-step explanation:

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2 years ago