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2 years ago

Please help me on my homework. (Due tomorrow, March 21, 2017) you will get 22 points if you answer.

Mathematics

1 answer:

Oliga [24]2 years ago

6 0

2. Look at which density value has the most samples, or which value has the most x's.

3. Look at the greatest density recorded and the lowest density recorded. What is the difference between these two densities? For example, if 1 and 3 were the lowest and greatest densities the answer would be 2.

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Dy/dx = y/x , y(1) = −2

s2008m [1.1K]

Start with

$\dfrac{dy}{dx}=\dfrac{y}{x}$

Separate the variables:

$\dfrac{dy}{y} = \dfrac{dx}{x}$

Integrate both parts:

$\displaystyle \int \dfrac{dy}{y} = \int\dfrac{dx}{x}$

Which implies

$\log(y) = \log(x)+c$

Solving for y:

$y = e^{\log(x)+c} = e^{\log(x)}e^c=xe^c$

Since $e^c$ is itself a constant, let's rename it $c_1$ .

Fix the additive constant imposing the condition:

$y(1) = c_1\cdot 1 = -2\iff c_1=-2$

So, the solution is

$y(x) = -2x$

5 0

3 years ago

HELP ME WITH 61 <br>I'm freaking out!!!!!!!!!!!!<br>I don't know what to do

Brut [27]

4.25+1.25*m, 5.75+0.75*m
4.25+5.75=10 and 1.25+0.75 = 2 therefore the two expressions are 2m+10
0.5m-1.5 : 4.25+1.25+m-5.75+0.75*m =0.5m-1.5 ( I'm quite sure about this one but I can't think of another answer but this )

5 0

2 years ago

Select all figures with 180 degree rotational symmetry.

Rzqust [24]

Answer: b, c and e.

Step-by-step explanation:

180° degree symmetry will mean that if we do a rotation of 180°, the figure will look exactly the same.

Now, let's suppose we have a figure with an odd number of sides.

We can draw that figure such that we have a side pointing down, and a vertex pointing up.

Now when we do a 180° rotation, the side will be pointing up and the vertex will be pointing down.

Then if the figure has an odd number of sides, it does not have a 180° rotational symmetry.

Now if the figure has an even number of sides, then we can do the same as above, but now we can put two parallel sides, one facing down and the other facing up, and when we do the rotation, we will end with the same image.

Then the correct options are the ones with an even number of sides:

b, c and e.

5 0

2 years ago

Emily can ride her scooter 18 miles in 50 minutes.

mihalych1998 [28]

Answer:

22.5 miles per hour (rounded answer)

Step-by-step explanation:

This is a fraction equal to

18 miles ÷ 0.8 hours

We want a unit rate where