Decide whether the relation is a function.{(-6, -9), (-3, -5), (-1, -4), (6, 3)}
A. Function
B. Not a function
Answer: A
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Find v ? u.v = 4i - 7j and u = -9i - 6j
A. -5i - 13j B. -78 C. -36i + 42j D. 6
Determine whether the given point is in the solution set to the given system.(-2, -1, 5) x - y + z = 42x - 8y - 3z = 243x + 4y + 2z = 7
A. Yes B. No
Graph the solution of the rational inequalities on a number line and write the solution in interval notation. 
? 0
A. 
? [5, ?)
B. 
? [5, ?)
C. [5, ?)
D. 
Solve the problem.Marty's Tee Shirt & Jacket Company is to produce a new line of jackets with a embroidery of a Great Pyrenees dog on the front. There are fixed costs of $690 to set up for production, and variable costs of $38 per jacket. Write an equation that can be used to determine the total cost, C(x), encountered by Marty's Company in producing x jackets, and use the equation to find the total cost of producing 121 jackets.
A. $5280 B. $5288 C. $5300 D. $5268