3 years ago

Please help! Two math problems!!!

Mathematics

1 answer:

Fynjy0 [20]3 years ago

3 0

Answer:

Tell me if i am wrong. :)

Step-by-step explanation:

To solve for y:

Q.1 2x + y = -1

y = -1 - 2x

Q. 2. 4x - 5y = 7

y = 7 - 4x over -5

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Step-by-step explanation:

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3.984

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The current in a circuit element is i(t) = 3(1 - e-2t) A when t ≥ 0 and i(t) = 0 when t < 0. The total charge that has entere

lesantik [10]

Answer:

A=-3/2

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Step-by-step explanation:

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$q(t)=\int_{-\infty}^0i(t')dt'+\int_0^t i(t')dt'=0+\int_0^t i(t')dt'$

The first term corresponds to q(0), the charge accumulated before t=0, in this case it luckily gives zero so we don't have to worry about it.

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