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3 years ago

Help someone I need help?

Mathematics

2 answers:

oksian1 [2.3K]3 years ago

4 0

I think it is answer choice c because it lists the coefficients and how many of them. 6 “st”’s

amm18123 years ago

3 0

What you need to do is look at the number in front of all the variables.

a) 1
Explanation: how many ys are there? 1 is the answer. (The reason we don't NEED to write 1 before a variable is for the same reason that when I say I have 1 thing, I can just say I have a thing. I don't need to include the 1)

c) 6
Explanation: how many sts are there? 6 is the answer.

d) -15
Because a variable to the '0' power equals 1, we can write this as -15x^0 and then we can come to -15(1) which is just -15. We write is with the x^0 so that we can ask, how many x^0 are there? -15 is the answer.

e) -1
Explanation: just like the coefficient of JUST dh would be 1, the coefficient of NEGATIVE dh would be -1

f) 1
Explanation: how many bcs are there? The answer is 1.

Best of luck! :)

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Step-by-step explanation:

Given

See attachment for complete question

Required

Determine the equilibrium solutions

We have:

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To solve this, we first equate $\frac{dR}{dt}$ and $\frac{dW}{dt}$ to 0.

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$0.09R(1 - 0.00025R) - 0.001RW = 0$

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Factor out R in $0.09R(1 - 0.00025R) - 0.001RW = 0$

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$R = 0$ or $0.09(1 - 0.00025R) - 0.001W = 0$

$R = 0$ or $0.09 - 2.25 * 10^{-5}R - 0.001W = 0$

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$R = \frac{0.02}{0.00004}$

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When $R = 500$ , we have:

$0.09 - 2.25 * 10^{-5}R - 0.001W = 0$

$0.09 -2.25 * 10^{-5} * 500 - 0.001W = 0$

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$- 0.001W = -0.07875$

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$W = \frac{-0.07875}{ - 0.001}$

$W = 78.75$

$W \approx 79$

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When $W = 0$ , we have:

$0.09 - 2.25 * 10^{-5}R - 0.001W = 0$

$0.09 - 2.25 * 10^{-5}R - 0.001*0 = 0$

$0.09 - 2.25 * 10^{-5}R = 0$

Collect like terms

$- 2.25 * 10^{-5}R = -0.09$

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$R = \frac{-0.09}{- 2.25 * 10^{-5}}$

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So, we have:

$(R,W) \to (4000,0)$

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$-0.02W + 0.00004W*0 = 0$

$-0.02W + 0 = 0$

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$(R,W) \to (0,0)$

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