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3 years ago

Directions: Choose the letter of the correct answer.

Mathematics

1 answer:

Bezzdna [24]3 years ago

4 0

Answer:

Step-by-step explanation:

1) y = 3x -------------(I)

y = 4x - 5 -------------(II)

Plug in y= 3x in equation (II)

3x = 4x - 5

3x + 5 = 4x

5 = 4x - 3x

5 = x

x= 5

Plug in s = 5 in equation (I)

y = 3*5 = 15

x = 5

y = 15

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torisob [31]

Answer:

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Step-by-step explanation:

<u><em>The correct question is</em></u>

Mary has 15 coins with the total value of $1.75 if the coins are nickels and quarters how many of each kind are there

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x ----> the number of nickel coins

y ----> the number of quarter coins

Remember that

$1\ nickel=\$0.05$

$1\ quarter=\$0.25$

we know that

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$x+y=15$ -----> equation A

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$0.05x+0.25y=1.75$ ----> equation B

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