Find the volume of the tetrahedron having the vertices (4.-1, 1) (9.-9, 9) (1, 1, 1) and (0,0,3)

The volume of the tetrahedron with those vertices is 2.

Step-by-step explanation:

The volume of the tetrahedron can be found by the mixed product of three vectors u,v,w divided by 6. So

is the determinant of a matrix in which each line is formed by the elements of those vectors.

With four points, we can have find three vectors.

We have those following points:

A(4,-1, 1)

B(9.-9, 9)

C(1, 1, 1)

D(0,0,3)

I am going to form those following vectors:

u = AB = B - A = (9,-9,9)-(4,-1,1) = (5, -8, 8)

v = AC = C - A = (1,1,1)-(4,-1,1) = (-3, 2, 0)

w = AD = D - A = (0,0,3) - (4,-1,1) = (-4,1,2)

The volume of the tetrahedron with those vertices is 2.

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.

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step-by-step explanation: