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Ira Lisetskai [31]
3 years ago
7

Solve for d. (d-e)/(3d +e)=d

Mathematics
1 answer:
iren2701 [21]3 years ago
8 0

\dfrac{d-e}{3d+e}=d\ \ \ \ |\text{cross multiply}\\\\d(3d+e)=d-e\\\\3d^2+de=d-e\ \ \ |-d+e\\\\3d^2+de-d+e=0\\\\3d^2+(e-1)d+e=0

Use the quadratic formula:

a=3,\ b=e-1,\ c=e\\\\b^2=(e-1)^2-4(3)(e)=(e-1)^2-12e\\\\d=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\d=\dfrac{-(e-1)\pm\sqrt{(e-1)^2-12e}}{2\cdot3}\\\\\boxed{d=\dfrac{1-e\pm\sqrt{(e-1)^2-12e}}{6}}

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Tiana flips a coin 3 times. The coin lands on heads twice and tails once, not necessarily in that order
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Hi,

Ways of getting TWO heads in three flips..
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Total possible outcomes..
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Probability=3/8
B
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3 years ago
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123 is a linear pair with the inside angle so
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3 years ago
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Simplify. 5(22 - 9 · 2) - 2( 3 · 2 4) 7 <br> a.-99 <br> b.-83 <br> c.-75 <br> d.-71
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Not completely sure on the symbols, but I think it is 5 x ( 22 - 9 x 2 ) - 2 ( 3 x 2 x 4 ) x 7 = 136. It doesn't really match the answers, so my advice is that you use a calculator for this one, or as the person/teacher who gave you the problem how to solve it.

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3 years ago
What is 52000-53800=? Show work
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The elephant is in danger of being completely wiped out. What sort of species is
xeze [42]

Answer:

Endangered species

Step-by-step explanation:

An endangered species is a species that is at risk of extinction due to rapid decrease in their population .Their decrease in population might be due to loss of habitat and genetic variation. The loss of habitat might be due to natural factors like the climate change For example animals like dinosaurs during the cretaceous period that experience rapid change in the climate loss their habitat and went extinct.

Human activity can also influence loss of habitat. Development in housing , agriculture and industry can also threaten the habitats of native organisms. The loss of their habitat might cause sudden extinction of these organisms. They might find it hard to adapt to another environment or even procreate.  

Generally,  endangered species are species that are threatened by extinction. Elephants that are in danger of been wiped out is an endangered species.

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