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Vadim26 [7]
3 years ago
7

Use a system of equations to solve a problem involving distance, speed, and time.

Mathematics
1 answer:
Yuki888 [10]3 years ago
7 0

Answer:

Speed of boat in still water is 26km/hr

Step-by-step explanation:

Let the speed of boat in still water be x and speed of stream by y.

Speed at which it went upstream would be (x-y) and the speed at which it went downstream would be (x+y). According to question x+y=24 and x-y=28. x=26 and y=-2.

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Mark and Julio are selling flower bulbs for a school fundraiser. Customers can buy bags of windflower bulbs and packages of croc
ikadub [295]

Answer:

Bag of windflower bulbs costs $8.50

Package of crocus bulbs costs $17.60

Step-by-step explanation:

Let $x be the price of one bag of windflower bulbs and $y be the price of one  package of crocus bulbs.

1. Mark sold 2 bags of windflower bulbs for $2x and 5 packages of crocus bulbs for $5y. In total he earned $(2x+5y) that is $105. So,

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2. Julio sold 9 bags of windflower bulbs for $9x and 5 packages of crocus bulbs for $5y. In total he earned $(9x+5y) that is $164.50. So,

9x+5y=164.50

3. You get the system of two equations:

\left\{\begin{array}{l}2x+5y=105\\ \\9x+5y=164.50\end{array}\right.

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5y=105-2x

Substitute it into the second equation:

9x+105-2x=164.50

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7x=59.5

x=$8.50

So,

5y=105-2·8.5

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y=$17.60

5 0
3 years ago
How many gallons is equivalent to 28 quarts? There are 4 quarts
nalin [4]

Since there are 4 quarts in a gallon and we have 28 quarts we would have 7 gallons.

<u>The answer is 7. </u>

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Answer:

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Step-by-step explanation:

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