Let the vector U = {(1,2,4); (0, -1, -3); (2,3,5); (1,0, -2)}. a. Find the dimension and a subspace basis W generated by the vector U.
b. Find the parameter k to u = (2, 3, k^2 + 1) is a the law of W, and deduce [u] w.

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Step-by-step explanation:

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )