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guapka [62]
3 years ago
14

Kyra went to the grocery store on Monday and bought 5 apples and 2 oranges for a total of $3.45. On Thursday she bought 7 apples

and 3 oranges for a total of $4.90.
Write a system of equations that represents this situation.
Mathematics
1 answer:
olganol [36]3 years ago
7 0

Answer:

5(x)+2(y)=3.45

7(x)+3(y)=4.90

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Answer:

#3.) The initial value of  16 gal at  x = 5 minutes means that 16 gallons of water was present 5 minutes after the barrel started leaking.

#4.) Find how many minutes until the barrel is empty of water.

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0 = (-2/5)*x + 18

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Step-by-step explanation:

#2.)  

minutes:      5, 10, 15, 20

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y - 10 = (-2/5)*(x - 20)

y - 10 = (-2/5)* x  + 8

y = (-2/5)*x + 18

rate of change slope means that for every minute  2/5 gallons of water is lost

#3.) The initial value of  16 gal at  x = 5 minutes means that 16 gallons of water was present 5 minutes after the barrel started leaking.

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Let y = 0,  to solve for time x.

0 = (-2/5)*x + 18

(2/5)*x = 18

x = (5/2)* 18 = 5*9 = 45 minutes

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