Simplify.[5(x - 4) - 9] + [8(x - 1) + 8]
A. 13x - 13
B. 13x - 29
C. 5x - 37
D. 13x - 9
Answer: B
Mathematics
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Multiply.-9(-3)(-3)
A. 19 B. 81 C. -81 D. -91
Mathematics
Solve the equation.
= 4 - 
A. 
B. 1
C. 
D. 2
Mathematics
Find the unit vector in the direction of the given vector. Write your answer in the indicated form.Let u = 
. Find the unit vector in the direction of u, and write your answer in component form.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem using the quadratic formula.The width of a rectangular computer screen is 3 inches more than its height. If the area of the screen is 238 square inches, find its dimensions.
A. 13 in. by 18 in. B. 14 in. by 17 in. C. 28 in. by 8.5 in. D. 15 in. by 16 in.
Mathematics