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seraphim [82]
3 years ago
5

Y=2x X+Y=-9 What's the answer ?

Mathematics
1 answer:
Elan Coil [88]3 years ago
3 0
y=2x\\
x+y=-9\\\\
x+2x=-9\\
3x=-9\\
x=-3\\\\
y=2\cdot(-3)\\
y=-6\\\\
\boxed{(x,y)=(-3,-6)}
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The weight Wkg of a metal bar varies jointly
maria [59]

Answer:

d = \sqrt{\frac{216W}{35L} }

Step-by-step explanation:

Given that W varies jointly as L and d² then the equation relating them is

W = kLd² ← k is the constant of variation

To find k use the condition W = 140 when d = 4 and L = 54, thus

140 = k × 54 × 4² = 864k ( divide both sides by 864 )

\frac{140}{864} = k , that is

k = \frac{35}{216}

W = \frac{35}{216} Ld² ← equation of variation

Multiply both sides by 216

216W = 35Ld² ( divide both sides by 35L )

\frac{216W}{35L} = d² ( take the square root of both sides )

d = \sqrt{\frac{216W}{35L} }

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3 years ago
ABCDEFGH is a rectangular prism with CD=5, AD=6, and AE=8. Find the volume of tetrahedron ABCF.
marta [7]
The answer would/will be 120
5 0
3 years ago
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<img src="https://tex.z-dn.net/?f=4%5Csqrt%7B3%7D%2B%5Csqrt%7B3%7D" id="TexFormula1" title="4\sqrt{3}+\sqrt{3}" alt="4\sqrt{3}+\
Firlakuza [10]

Answer:

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Step-by-step explanation:

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Answer:

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2 years ago
How to do this question..?
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uh idk um...

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