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pogonyaev
3 years ago
5

Which ratio is equivalent to 12:20?a) 3:5b) 20:12c) 3:10d) 2:3​

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
8 0

Answer:

it is a 3:5

Step-by-step explanation:

disa [49]3 years ago
3 0

Answer:

D

Step-by-step explanation:

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Problem1 The behavior of a physical system can be described by the following first order differential equation: dy/dt=2y +t^2
daser333 [38]

Answer:

y = \dfrac{t^3e^{2t}}{3}+Ce^{2t}.

Step-by-step explanation:

Using first order linear differential equation:

\dfrac{\mathrm{d} y}{\mathrm{d} t} = 2y + t^2

\frac{\mathrm{d} y}{\mathrm{d} t} - 2y =t^2

finding integrating factor:

I.F = e^{\int -2dt}

I.F =e^{-2t}

now,

y = \dfrac{1}{IF}(\int t^2dt+ c )

y = \dfrac{1}{e^{-2t}}(\int t^2dt+ c )

y = \dfrac{t^3e^{2t}}{3}+Ce^{2t}

hence the solution is

y = \dfrac{t^3e^{2t}}{3}+Ce^{2t}

8 0
3 years ago
7y - 9 = 3y + 19<br> a. 7<br> b. -4<br> C.<br> -7<br> d. 4
andreev551 [17]
The answer is A. 7
so y=7
6 0
2 years ago
Please help me with this question
kiruha [24]

Answer:

First Row: Given

Second Row: Definition of Regular Polygon

Third Row: Definition of Congruence In Terms of Rigid Motion

Fourth Row: Definition of Regular Polygon

Fifth Row: SAS Triangle Congruence Theorem

Sixth Row: CPCTC

Step-by-step explanation:

This is a basic proof in order to prove that verticals of a polygon are congruent. This should be the right answer since it's the only thing that makes sense to me. I really hope this helps you and thanks for being patient! I've been doing geometry and we have to prove everything we claim in a proof just like this one. However, there was one I kind of guessed on (the third row), but I think it should be correct! I saw from the photo that you have a check answer on the bottom of your screen. Just check the answers that I have for you now and if something is wrong, then we can continue talking about it! Hope this helps!! :)

3 0
3 years ago
Triangle ABC is reflected over the x-axis. What are the coordinates of the image of the vertex A?
MAXImum [283]

Answer:

A. A' (2, -5)

Step-by-step explanation:

A is the right answer because the coordinates of vertex A are (2, 5)

<em>PLEASE</em><em> </em><em>DO MARK</em><em> </em><em>ME AS</em><em> </em><em>BRAINLIEST</em><em> IF</em><em> </em><em>MY ANSWER</em><em> </em><em>IS HELPFUL</em><em> </em><em>:</em><em>)</em>

8 0
3 years ago
Read 2 more answers
Can someone please answer. There is one question. There's a picture. Thank you!
stepan [7]
By Cosine Rule:

CosT = (s² + r² - t²) /(2sr)

<span>CosT = (10² + 11² - 7²) /(2*11*10)
</span>
<span>CosT = 172 /220 </span>≈ 0.7818

T = Cos⁻¹(0.7818)

T ≈ 38.57°

T ≈ 38.6°
5 0
3 years ago
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