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r-ruslan [8.4K]
2 years ago
5

What is the answer for this question-7x-2y=-13

Mathematics
1 answer:
Gala2k [10]2 years ago
5 0
What are you trying to find? y?x?..???
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There were 200,000 animals of a certain species in 1980. Since then,this number has decreased by 4.5% each year. Approximately h
g100num [7]

Answer: Approximately 25187 animals of this species will be left in 2025

Step-by-step explanation:

We would apply the formula for exponential decay which is expressed as

y = b(1 - r)^x

Where

y represents the population of animals after x years.

x represents the number of years.

b represents the initial population of animals.

r represents rate of decay.

From the information given,

b = 200000

r = 4.5% = 4.5/100 = 0.045

x = 2025 - 1980 = 45 years

Therefore,

y = 200000(1 - 0.045)^45

y = 200000(0.955)^45

y = 25187

8 0
3 years ago
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What is the difference & similarities of matter and mass ?
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 that differences are that mass is a measurement of the amount of matter something contains  and mass is measured by using a balance comparing a known amount of matter to an unknow of matter
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PLEASE HELP!!!!!!!! WILL MARK AS BRAINLIEST!!!!!
Ratling [72]

A.) 2, 7

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7 0
2 years ago
Which equation is not equivalent to 2x+10=-8
Vlada [557]

Answer:

2x+10=-8

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Step-by-step explanation:

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I need help ASAP I have 8 minutes left
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Answer:

The answer is A

Step-by-step explanation:

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