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Sonbull [250]
3 years ago
14

at first, the ratio of john’s money to peter’s money was 4:7 . after john spent half of his money and peter spent $60, peter had

twice the amount of money as john. how much money did john have at first?
Mathematics
1 answer:
hodyreva [135]3 years ago
4 0

Answer:

$80

Step-by-step explanation:

4x/2=2x

7x-60

7x-60=2x*2

7x-60=4x

3x=60

x=20

20*4=80

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Please see the image and help with this homework problem. thank you!
dimulka [17.4K]

we have the function

E=\sin \frac{\pi}{14}t

Part a

For t=7

substitute in the given function

\begin{gathered} E=\sin \frac{\pi}{14}7 \\ E=1 \end{gathered}

For t=14

\begin{gathered} E=\sin \frac{\pi}{14}14 \\ E=0 \end{gathered}

For t=21

\begin{gathered} E=\sin \frac{\pi}{14}21 \\ E=-1 \end{gathered}

For t=28

\begin{gathered} E=\sin \frac{\pi}{14}28 \\ E=0 \end{gathered}

For t=35

\begin{gathered} E=\sin \frac{\pi}{14}35 \\ E=1 \end{gathered}

Observation: The values of E varies from -1 to 1, including the zero

Part B

Remember that

The Period goes from one peak to the next

so

Period=2pi/B

B=pi/14

Period=(2pi)/(pi/14)=2pi*14/pi=28

<h2>the period is 28 days</h2>
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1 year ago
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allsm [11]
It has to be 45 degrees pal
6 0
3 years ago
Luis earns $30 washing 3 dogs. At this rate, how many dogs did Luis wash to earn $70?​
Nadusha1986 [10]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
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Robin has a table full of supplies that she will use to decorate picture frames. She decorated one frame with 3 buttons and 12 b
zvonat [6]
She could use anything, but it would have to consist of 3:12, so maybe like 3 flowers and 12 beads? As long as it is 3 and 12 of something, she is fine. 
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The difference is  6.887 x 10⁷ km .  (rounded)

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3 years ago
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