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Vikentia [17]
2 years ago
15

Problem 8

Mathematics
1 answer:
SpyIntel [72]2 years ago
3 0
Answer:

Explanation:

1. x represent the copybook while y represent the pen that is bought.

2. 2x + 3y = 9000 means that in order to buy 2 copybooks and 3 pen you have to pay 9000 LL.

3. Solve for the price of x and y

2x + 3y = 9000 (1)
4x + 2y = 8000 (2)

Multiply (1) by -2:

-2(2x + 3y = 9000)
4x + 2y = 8000
——————————
-4x - 6y = -18000
4x + 2y = 8000
—————————
-4y = -10000
y = -10000/-4
y = 2500

Substitute y value into (2):

4x + 2(2500) = 8000
4x + 5000 = 8000
4x = 3000
x = 3000/4
x = 750

Therefore, 1 copy book = 750LL and 1 pen = 2500 LL
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Write an equation of the line that passes through (2, -5) and is parallel to the line 2y = 3x + 10
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First you get "y" by itself. To do so you divide 2 on both sides.

y = 3/2x + 5

To write an equation of a line that is PARALLEL to this equation, the slopes have to be the SAME. So the slope is 3/2.

You then use the equation:

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SInce you know "m" you plug it in.

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Now you need to find b. To do so you plug in the point (2, -5) into this equation.

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Finally you plug in b and you get your new equation.

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Answer attachment below 50 points + brainiest HURRY
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a_sh-v [17]
Number 19

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answer:
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