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3 years ago

Help me with right answer plz

Mathematics

1 answer:

givi [52]3 years ago

7 0

Answer:

13.5

Step-by-step explanation:

area: 1/2*[x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)]

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lianna [129]

Well the equation for slope is $\frac{ y_{2}- y_{1} }{ x_{2} - x_{1} }$

number 5
$\frac{-1-(-2)}{3-(-2)} = \frac{1}{5}$
which means the slope is $\frac{1}{5}$

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3 years ago

I need help with all of these

Olin [163]

If you take your calculator and enter in -82+28 it should give you the answer easily If you dont have one use ur phone.

Easiest way 1.o.1

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4 years ago

Solve the equation. 8n+15=25

Aneli [31]

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3 years ago

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Help with numer 5 please. thank you

Alex17521 [72]

Answer:

See Below.

Step-by-step explanation:

We are given that:

$\displaystyle I = I_0 e^{-kt}$

Where I₀ and k are constants.

And we want to prove that:

$\displaystyle \frac{dI}{dt}+kI=0$

From the original equation, take the derivative of both sides with respect to t. Hence:

$\displaystyle \frac{d}{dt}\left[I\right] = \frac{d}{dt}\left[I_0e^{-kt}\right]$

Differentiate. Since I₀ is a constant:

$\displaystyle \frac{dI}{dt} = I_0\left(\frac{d}{dt}\left[ e^{-kt}\right]\right)$

Using the chain rule:

$\displaystyle \frac{dI}{dt} = I_0\left(-ke^{-kt}\right) = -kI_0e^{-kt}$

We have:

$\displaystyle \frac{dI}{dt}+kI=0$

Substitute:

$\displaystyle \left(-kI_0e^{-kt}\right) + k\left(I_0e^{-kt}\right) = 0$

Distribute and simplify:

$\displaystyle -kI_0e^{-kt} + kI_0e^{-kt} = 0 \stackrel{\checkmark}{=}0$

Hence proven.

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3 years ago

Question is in photo. Thanks

Triss [41]

Answer: yes

Step-by-step explanation: because if you can draw a line through the graph and hit most of the dots it would be considered linear.

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