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2 years ago

How much would it cost to buy 3 $13 battery packs and 3 $22 copper wires

Mathematics

1 answer:

Makovka662 [10]2 years ago

6 0

It would cost $105 because if you do 13+13+13= 39
22+22+22= 66
66+39= 105.

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Find dy/dx for 4 - xy = y^3

storchak [24]

Answer:

$\frac{dy}{dx}=-\frac{y}{3y^2+x}$

Step-by-step explanation:

4-xy=y^3

dy/dx=?

$\frac{d(4-xy)}{dx}=\frac{d(y^3)}{dx}\\ \frac{d(4)}{dx}-\frac{d(xy)}{dx}=3y^{3-1}\frac{dy}{dx}\\ 0-(\frac{dx}{dx}y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -(1y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -(y+x\frac{dy}{dx})=3y^2\frac{dy}{dx}\\ -y-x\frac{dy}{dx}=3y^2\frac{dy}{dx}$

Solving for dy/dx: Addind x dy/dx both sides of the equation:

$-y-x\frac{dy}{dx}+x\frac{dy}{dx}=3y^2\frac{dy}{dx}+x\frac{dy}{dx} \\ -y=3y^2\frac{dy}{dx}+x\frac{dy}{dx}$

Common factor dy/dx on the right side of the equation:

$-y=(3y^2+x)\frac{dy}{dx}$

Dividing both sides of the equation by 3y^2+x:

$\frac{-y}{3y^2+x}=\frac{(3y^2+x)}{3y^2+x}\frac{dy}{dx}\\ -\frac{y}{3y^2+x}=\frac{dy}{dx}\\ \frac{dy}{dx}=-\frac{y}{3y^2+x}$

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3 years ago

NEED URGENT HELP I WILL DO ANYTHING

seropon [69]

1. Here are the four steps of the statistical process in correct order:
1) Plan - Form a question that can be answered by data.
2) Collect data - Design and implement a plan that collects data.
3) Process - Analyze the data using graphical and numerical methods.
4) Present and discuss - Interpret and compare the data.
So your answer is the last option.

2. I am definitely sure that Edgar wrote a statistical, because every neighbor can give a different answer. A statistical question is the question which you don't expect to get only one answer. Instead of that you will get a variety of different answers.

3. According to what I've mentioned before, the only statement which shows a characteristic of a statistical question is: There can be variability in the answers to the question.

4. I am completely sure that this one is statistical question: How many hours do you spend each week training for a sports league? Because it could be answered with variability.

5. The only statistical question in his survey is: How many hours do you spend at the food court each month?. Because it gives him more different answers for his survey.

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3 years ago

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Steve sells half of his comic books and then buys 6 more now he has 14 comic books

ddd [48]

Let b be the initial amount of books. Steve sells half of his books, so the number of Steve's books become

$b \to \dfrac{b}{2}$

Then, he buys 6 more, so the number increases by 6:

$\dfrac{b}{2} \to \dfrac{b}{2}+6$

This number is now 14, so you have

$\dfrac{b}{2}+6 = 14$

Subtract 6 from both sides:

$\dfrac{b}{2} = 8$

Multiply both sides by 2:

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Miguel and his brother Ario are both standing 3 meters from one side of a 25 meter pool when they decide to race. Miguel offers

nalin [4]

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Therefore, the distance that Ario had covered is 4.4 m.

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I willl mark brainiest plz answer send right answer get points

kirza4 [7]

Answer: Option D

Step-by-step explanation:

Soup : 15/5 is 3 x 7 is 21

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