Solve the equation 
for x.
a. 
b. -2
c. 
d. 
c.
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Solve the problem.A boat heads S 50° W propelled by a force of 600 lb. A wind from N 42° W exerts a force of 125 lb on the boat. How large is the resultant force, and in what direction is the boat moving?
A. 609 lb, S 62° W B. 652 lb, S 38° W C. 652 lb, S 62° W D. 609 lb, S 38° W
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. An “exercise” can be solved by simply applying a routine procedure, but a “problem” is not routine and requires a well-thought-out plan of attack. 2. If there are infinitely many numbers involved in a problem, the Guess and Test problem-solving strategy is indicated. 3. If 12 coins are arranged in the shape of an equilateral triangle, then there are 5 coins along each side. 4. If the fourth phase of problem solving,“Looking Back,” we should look for other ways to solve the problem even if we got the ‘right’ answer.
Find the focus and directrix of the parabola with the given equation.- 
x2 = y
A. focus: (-16, 0) directrix: x = 8 B. focus: (0, 8) directrix: y = -8 C. focus: (0, -8) directrix: y = 8 D. focus: (0, -8) directrix: y = -8
Write the sum in summation notation.7 + 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 