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lakkis [162]
3 years ago
14

Pani Natalia kupiła 30 kg jabłek za 75 zł i 16 kg ogórków za 104 zł. Oddała sąsiadce 2/5 (dwie piąte) jabłek i 2/5 ogórków. Jaka

była wartość przekazanych zakupów?
A. 71 zł 60 gr.
B. 18 zł 40 gr.
C. 90 zł
D. 41 zł 60 gr.

Proszę o odpowiedź z działaniem jak najszybciej.

Daje naj :-)
Mathematics
1 answer:
adell [148]3 years ago
6 0

Answer:

Correct choice is A

Step-by-step explanation:

Natalia bought 30 kg of apples that cost 75 zl. Then \dfrac{2}{5} of apples costed

\dfrac{2}{5}\cdot 75=2\cdot 15=30\ zl.

Natalia bought 16 kg of cucumbers that cost 104 zl. Then \dfrac{2}{5} of cucmbers costed

\dfrac{2}{5}\cdot 104=2\cdot 20.8=41.6\ zl.

Then the total cost is

30+41.6=71.6\ zl.=71\ zl\ 60\ gr.

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A jar contains n nickels and d dimes. There is a total of 253 coins in the jar. The value of the coins is $15.95. How many nicke
defon

There are 187 nickels and 66 dimes in the jar.

Step-by-step explanation:

Given,

Total coins = 253

Value of coins = $15.95 = 15.95*100 = 1595 cents

Value of each nickel = 5 cents

Value of each dime = 10 cents

According to given statement;

x+y=253     Eqn 1

5x+10y=1595     Eqn 2

Multiplying Eqn 1 by 5

5(x+y=253)\\5x+5y=1265\ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(5x+10y)-(5x+5y)=1595-1265\\5x+10y-5x-5y=330\\5y=330

Dividing both sides by 5

\frac{5y}{5}=\frac{330}{5}\\y=66

Putting y=66 in Eqn 1

x+66=253\\x=253-66\\x=187

There are 187 nickels and 66 dimes in the jar.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/12905000
  • brainly.com/question/12918501

#LearnwithBrainly

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3 years ago
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Answer:

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Answer:

4.50%

Step-by-step explanation:

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Read 2 more answers
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