Solve the system by substitution.x - 4y = -6y = 3
A. (-6, 3)
B. (3, 6)
C. (-18, 3)
D. (6, 3)
Answer: D
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Solve the problem.A charged particle of mass m and charge q moving in an electric field E has an acceleration a given by 
where q and E are constants. Find 
.
A. 
= 
B. 
= - 
C. 
= 
D. 
= 
Annual sales (in millions of units) of hand-held computers are expected to grow in accordance with the function
?
?
where 
is measured in years, with 
corresponding to 1997. How many hand-held computers will be sold over the 3-year period between the beginning of 1997 and the end of 1999? Round your answer to two decimal places, if necessary.
Fill in the blank(s) with the appropriate word(s).
Graph the equation by hand. To begin, substitute the indicated values for x and complete the table. Make other substitutions as necessary.y = -2x2 + 3x + 2
What will be an ideal response?
Determine the period of the function and sketch its graph.y = cos 
A. period: 6
B. period: 6?
C. period: 6
D. period: 3