Find the product.(x + 4)(x - 4)
A. x2 + 8x - 16
B. x2 - 8
C. x2 - 16
D. x2 - 8x - 16
Answer: C
Mathematics
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Use the given information to find the exact value of the trigonometric function.cos ? = - 
, ? lies in quadrant III
Find cos 
.
A. - 
B. 
C. - 
D. 
Mathematics
Graph the solution of the inequality on a number line.-1 < x < 3
A. 
B. 
C. 
D. 
Mathematics
Translate the sentence to an equation using the variable x. Then solve the equation.When 5 times a number is subtracted from 7 times the number, the result is 18.
A. 7x - 5x = 18; 9 B. 5x(7 - x) = 18; -9 C. 5x + 9x = 18; 2 D. 5(x - 7) = 18x; 2
Mathematics
Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this.7x - 6y = 364x - 3y = 18
A. (0, -6) B. (-1, -5) C. No solution D. (0, -5)
Mathematics