# Posts by mando

Total # Posts: 11

**history**

which war did the most americans die - american revolutionary war?, WW1, US civil war? or WW2?

**linear algebra**

Find x such that the matrix is equal to its own inverse. 3,x -2,-3

**linear algebra**

Use an inverse matrix to solve each system of linear equations. A) x+2y=-1 B)x+2y=10 C)x+2y=-3 x-2y=3 x-2y=-6 x-2y=0

**linear algebra**

Use an inverse matrix to solve each system of linear equations. A) x+2y=-1 B)x+2y=10 C)x+2y=-3 x-2y=3 x-2y=-6 x-2y=0

**linear algebra**

Use an inverse matrix to solve each system of linear equations. A) x+2y=-1 B)x+2y=10 C)x+2y=-3 x-2y=3 x-2y=-6 x-2y=0

**unit tangent vector**

oh ok, now i get it.

**unit tangent vector**

how does 1/e equal to 1? ∥r'∥ = √(4e^4 + 1 + 4)

**unit tangent vector**

r(t)=e^(2t)i+e^(-t)j+(t^2+4)k at (1,1,4)

**unit tangent vector**

oh yes it is.

**unit tangent vector**

Find a unit tangent vector to r(t)=e^(2t)i+e^(-1)j+(t^2+4)k at (1,1,4).

**Calc**

Find the point in which the line x=1-t, y=3t, z=1+t; meet the plane 2x-y+3z=6

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