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Marysya12 [62]
2 years ago
13

You drank 50 L of water on Tuesday but only 30 L of water on Wednesday. What is the percent of change

Mathematics
1 answer:
Slav-nsk [51]2 years ago
8 0

Answer:

40% decrease

50=100

30/50=x/100

30=60% of 50

40% decrease of 50 is 30

Step-by-step explanation:

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musickatia [10]

Try this solution:

Answer: 6 & 4.5 (m-per-h)

Step-by-step explanation:

- The basic formula used in this task is S=V*t, where S - distance, V - speed, t - time.

- the downstream speed is: V+Vc, where V - the speed of the boat in still water, Vc - the speed of the current.

- the upstream speed is: V-Vc.

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- Using these it is possible to make up the system of the equations:

\left \{ {{(70(V-V_c)=10(V+V_c)} \atop {70(V-V_c)+10(V+V_c)=210}} \right.

V - the speed of the boat in still water - 6 miles per hour, Vc - the speed of the current - 4.5 miles per hour. All the details for the system of the equations are in the attachment.

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