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AnnyKZ [126]
3 years ago
10

Uss the distributive property to write an equivalent expression for 21p + 35q

Mathematics
1 answer:
Mama L [17]3 years ago
7 0
Hey there!
It looks like we're factoring.
I always like to think of factoring as the opposite of the distributive property, and you'll see why.
First, we have to <em>factor</em> out a common <em>factor</em> from 21p and 35q, which we'll use as 7.
7 times 3p = 21p and 7 times 5q = 35q
Using our distributive property which is defined as:
a(b+c) = ab+ac we have:
7(3p + 5q)
Multiply it out and you'll get 21p and 35q.
Hope this helps!
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bdy%7D%7Bdt%7D%20%2B%200.5yt%3D8t" id="TexFormula1" title=" \frac{dy}{dt} + 0.5yt=
katrin2010 [14]
\dfrac{\mathrm dy}{\mathrm dt}+\dfrac t2y=8t
e^{t^2/2}\dfrac{\mathrm dy}{\mathrm dt}+\dfrac t2e^{t^2/2}y=8te^{t^2/2}
\dfrac{\mathrm d}{\mathrm dt}\left[e^{t^2/2}y\right]=8te^{t^2/2}
e^{t^2/2}y=8\displaystyle\int te^{t^2/2}\,\mathrm dt
e^{t^2/2}y=8e^{t^2/2}+C
y=8+Ce^{-t^2/2}

With y(0)=9, we get

9=8+Ce^0\implies C=1

and so the particular solution must be

y=8+e^{-t^2/2}
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3 years ago
D = {x|x is a whole number}
Gemiola [76]
D = {x|x is a whole number}
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D ∩ F = {2, 4, 6, 8}


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