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Anvisha [2.4K]
3 years ago
6

Find the critical point of the function f(x) = x2 – 2x + 7.

Mathematics
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

x=1 is a critical point of the function f(x).

Step-by-step explanation:

f(x)=x^2-2x+7

Differentiate both sides w.r.t. x

\Rightarrow f'(x)=2x-2

Now, f'(x)=0

\therefore 2x-2=0

\Rightarrow 2x=2

\Rightarrow x=1

Hence, x=1 is a critical point of the given function.

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Answer:

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2 years ago
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What is the 101st term in the sequence 997, 989, 981, ...?
melamori03 [73]

Answer: first option.

Step-by-step explanation:

Find the common difference d of the arithmetic sequence:

d=a_n-a_{(n-1)}\\d=989-997\\d=-8

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4 0
3 years ago
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Can someone smart please help me?
ollegr [7]
Hello! 

For a:

How I would do this, is I would first say if all 46 animals (heads) were chickens, how many legs would there be? Each chicken has 2 legs, so 46 * 2 = 92. The total amount of legs is 96 as stated in the question, so if all of the animals were chickens, the farmer would be 4 legs short.

Now to add rabbits into the equation. Rabbits have 4 legs, and chickens have 2. You want to find the difference between the two, because as you add rabbits to the animals the farmer has, then you have to take away chickens at the same time. 4-2 = 2, so for each rabbit you replace, you add 2 legs. 

Since the farmer is 4 legs short with all chickens, then you just divide that 4 by the 2 legs you add by replacing a chicken with a rabbit.

4 / 2 = 2 rabbits

So that means there are 2 rabbits. Since there are 46 heads in total, if 2 are rabbits, that means there are 44 chickens.

So there are 44 chickens and 2 rabbits.

b)

You can follow the same steps: I'm assuming all are child tickets for now:

3.05 * 100 = $305

And now you find how much money short you are.

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Next, you find the difference in the ticket costs.

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Since 100 tickets were sold, and 88 adult tickets were sold, that means 12 child tickets were sold.
7 0
3 years ago
Laura is baking a cake. The recipe says that she has to mix 64 grams of chocolate powder to the flour. Laura knows that 1 cup of
pickupchik [31]
The answer is <span>She went over by one over six of a cup
</span>
<span>1 cup of that particular chocolate powder has a mass of 128 grams: 1c = 128g

</span><span>64 grams of chocolate powder is x cups.
1c = 128g
x = 64g

1c : 128 g = x : 64g
x = </span>1c : 128 g * 64 g
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<span>She added two over three of a cup of chocolate powder: 2/3 cups

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So she added 4/6 - 3/6 = 1/6 cups more.
</span>
5 0
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