# ehw2_key - Math 2433 Online Summer 2012 Homework Week 2...

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Math 2433 Online - Summer 2012 Homework Week 2 Instructions Homework will NOT be accepted through email or in person. Homework must be submitted through CourseWare BEFORE the deadline. Submit the multiple choice section of the assignment at http://www.casa.uh.edu under "EMCF" and choose ehw2 . Upload the written section of the assignment at http://www.casa.uh.edu under "Assignments" and choose whw2 . 1. Find values of b such that the vectors ( ) 11, , 2 b and ( ) 2 ,, bb b are orthogonal (perpendicular). a. { } 0,3,11 b = b. { } 0, 2, 11 b = c. { } 0, 2, 2 b = d. { } 0,3, 3 b = e. { } 0,11, 2 b = f. None of these. 2. Find the area of the triangle with vertices ( ) ( ) 0, 0, 0 , 1, 0, 1 and ( ) 1, 1, 2 a. 11 b. 11 2 c. 6 d. 6 2 e. 1 f. None of these. 3. Find parametric equations for the intersection of the planes 0 xz = and 23 0 xy z + += a. The line given by: ,3 3 , xt y t zt = = = b. The line given by: 2, 13 , y t z t = − − = = c. The line given by: 1, 6, 12 y t z t =+ = d. The plane given by: 3333 0 xyz + + = e. The line given by: 1, 6 , 1 y = = f. None of these.

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