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3 years ago

7

Hans cellphone plan costs $200 to start. Then there is a $50 charge each month

1 answer:

Gnesinka [82]3 years ago

4 0

Y=200+50x and x is how many months

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(a) Jane pumped 54 gallons of water out of her pool. This was done over a period of 9 minutes at

STALIN [3.7K]

Answer: -6
Step-by-step explanation:
From the question, Elsa pumped 18 gallons of water out of her pool and this was done over a period of 3 minutes at a constant rate. Since it is done at a content rate, to get the change in the amount of water in the pool each minute, we divide 18 gallons by 3. This can be written mathematically as:
= 18 gallons ÷ 3
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Change = -6
The change in the amount of water in the pool each minute will be -6gallons hope this helps

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

Yu has $20.28 and spends $2.80 on a hot dog. He lends half of his remaining money to a friend. How much money does Yu lend his f

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3 years ago

You have dimes and quarters in your pocket. There are 12 coins that total $2.25. Write and solve a system of linear equations to

icang [17]

Answer:

Hence the System of equation are $\left \{ {{x+y=12} \atop {0.1x+0.25y=2.25}} \right.$

There are 5 dimes and 7 quarters in my pocket.

Step-by-step explanation:

Let Number of dimes be 'x'.

Also Number of quarters be 'y'.

Now Given:

Total Number of Coins = 12

So the equation can be framed as;

$x+y=12 \ \ \ \ equation \ 1$

Also Given:

Total Amount in pocket = $2.25

Now we know that 1 dime = $0.1

Also 1 quarter =$0.25

So the equation can be framed as;

$0.1x+0.25y = 2.25 \ \ \ \ equation \ 2$

Hence the System of equation are $\left \{ {{x+y=12} \atop {0.1x+0.25y=2.25}} \right.$

Now Solving the equation we get;

Now Multiplying equation 2 by 10 we get;

$10(0.1x+0.25y)=2.25\times10\\\\10\times0.1x+10\times0.25y=22.5\\\\x+2.5y=22.5 \ \ \ \ equation\ 3$

Now Subtracting equation 1 from equation 3 we get;

$(x+2.5y)-(x+y)=22.5-12\\\\x+2.5y-x-y =10.5\\\\1.5y =10.5\\\\y= \frac{10.5}{1.5}= 7$

Now Substituting the value of y in equation 1 we get;

$x+y=12\\\\x+7=12\\\\x=12-7 =5$

Hence there are 5 dimes and 7 quarters in my pocket.

6 0

3 years ago