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Given information
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3 bags + 4 pens = $950
4 bags + 3 pens = $1150
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Form the 2 equations
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Let x be the cost of 1 bag.
Let y be the cos of 1 pen.
3x + 4y = 950
4x + 3y = 1150
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Solve for x and y
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3x + 4y = 950 -------------- (1)
4x + 3y = 1150 ------------- (2)
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Equation (1) x 4
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12x + 16y = 3800 ------------- (1a)
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Equation (2) x 3
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12x + 9y = 3450 ------------- (2a)
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Equation (1a) - (2a)
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(12x + 16y) - (12x + 9y) = 3800 - 3450
7y = 350
y = 350 ÷ 7
y = 50
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Substitute y = 50 into equation (1)
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3x + 4 (50) = 950
3x + 200 = 950
3x = 950 - 200
3x = 750
x = 250
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Find cost of a bag and a pen
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Bag = x = $250
Pen = y = $50
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Answer: The bag cost $250 and the pen cost $50
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prev Statement of a problem № 2618 next
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. Find the stress, the strain, and the Young’s modulus for the material of the wire.
Solution:
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a lo
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prev Statement of a problem № 2618 next
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. Find the stress, the strain, and the Young’s modulus for the material of the wire.
Solution:
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a lo
main
prev Statement of a problem № 2618 next
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. Find the stress, the strain, and the Young’s modulus for the material of the wire.
Solution:
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a lo
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prev Statement of a problem № 2618 next
A i did the test but for me. There was five u could choose from hope this helps
Answer:
Step-by-step explanation:
Plus 7 on each side of the equal sign which gives you
40=8t
Divide each side by 8
T=5
Answer:
option b is ans.........
the formula is1/2 ×base × height
in this case base is 4 and height is 6 so option b is correct....
