Find projv u.v = 7i - 3j + k, u = -4j + 3k

A. - j + k
B. i - j + k
C. - j + k
D. i - j + k


Answer: B

Mathematics

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One model for expenditures at high schools gives the cost C, in dollars per pupil, as a function of the number n of students enrolled. The relationship is . ? Find the enrollment and cost that correspond to the minimum cost per pupil. Round your answers to the nearest whole number.

A. An enrollment of 1909 gives a minimum cost of $340 per pupil. B. An enrollment of 340 gives a minimum cost of $1909 per pupil. C. An enrollment of 1911 gives a minimum cost of $344 per pupil. D. An enrollment of 344 gives a minimum cost of $1911 per pupil.

Mathematics

Multiply. Express the product in lowest terms. ? 

A.  
B.  
C.
D.  

Mathematics

Find the real solutions, if any, of the equation. Use the quadratic formula.49x2 - 12 = 28x

A. {- }
B. {, - }
C. {, - }
D. {- , - }

Mathematics

Divide. ÷ 

A.
B.
C.
D.

Mathematics