2 years ago

A car travels 552.5 miles in 8.5 hours. An equation that represents the distance,d, a car travels in h hours is h = 65d

Mathematics

1 answer:

statuscvo [17]2 years ago

3 0

Answer:

True

Step-by-step explanation:

it's true cuz im corrrect

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How did he get this 1/2i ? I dont remember studying this definition in calc 1 neither calc 2!

Hitman42 [59]

The $i$ in the denominator is missing in the second expression. It should be

$\sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

This follows from

$e^{iat}=\cos at+i\sin at$
$e^{-iat}=\cos at-i\sin at$
$\implies e^{iat}-e^{-iat}=2i\sin at$
$\implies \sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

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3 years ago

What percent of 28 is 21? (Please explain fully, sorry I just don't get it)

Zepler [3.9K]

28 is the "100%" in this equation so all you need to do is take the number that is not the 100% and divide it by the 100% number. so

21/28

comment for more help if you need it for future problems

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3 years ago

Does someone mind helping me with this question? Thank you!

BartSMP [9]

Answer:

Step-by-step explanation:

3(4)²-2(4)+1

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2 years ago

Read 2 more answers

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