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a_sh-v [17]
3 years ago
13

2 PointsSimplify 4.2a+3.5b-3.1a.​

Mathematics
2 answers:
Vlad1618 [11]3 years ago
6 0

Answer: 1.1a +3.5b

Step-by-step explanation: You can combine the a’s because they are the same variable. 3.1a has a subtraction sign in front of it so when you combine it with 4.2a you’re actually subtract once 3.1 from 4.2 :)

Alik [6]3 years ago
3 0
1.1a+3.5b is your answer because 3.1a minus 4.2a is 1.1a and you don't do anything to the 3.5b because that is the only b
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If A * B is defined as (A + B)/AB, compute (2 * 6) * (3 * 4)
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Read 2 more answers
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<h3>How to determine the volume?</h3>

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V = 707 * 23

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6 0
2 years ago
Find the general solution for differential equation<br><br> (D4 - 5D3 + 5D2 + 5D - 6)y = 0
slava [35]
Given differential equation, (D4 - 5D3 + 5D2 + 5D - 6)y = 0

=> For general solution of equation,

Solve D4 - 5D3 + 5D2 + 5D - 6 = 0

=> D4 - 5D3 + 6D2 - D2 + 5D - 6 = 0

=> D2 (D2 - 5D + 6) - (D2 - 5D + 6) = 0

=> (D2 - 5D + 6)(D2 - 1) = 0           ................................(1)

Now

D2  - 1 = (D - 1)(D + 1)  and

Factors of D2 - 5D + 6

D2 - 5D + 6 = D2 - 2D - 3D + 6

= D(D - 2) - 3(D - 2)

= (D - 3)(D - 2)

Therefore, equation (1) implies

(D2 - 5D + 6)(D2 - 1) = (D - 3)(D - 2)(D - 1)(D + 1) = 0

=> D = 3, 2, 1, -1 or D = -1, 1,, 2, 3

=> General solution of differential equation is,<span>

=><span> y = C1 e-x + C2 ex + C3 e2x + C4 e3x</span> .

Hope it helps
</span>
8 0
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