Find matrices A, X, and B such that the linear system is equivalent to the matrix equation AX = B.
A. A = 
, X = 
, B = 
B. A = 
, X = 
, B = 
C. A = 
, X = 
, B = 
D. A= 
, X = 
, B = 
Answer: D
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Solve the equation. Express your answer in trigonometric form.ix3 + 1 - i
= 0
A. 21/3(cos ? + i sin ?) for ? = 50°, 122°, 194°, 266°, 338° B. 2(cos ? + i sin ?) for ? = 50°, 122°, 194°, 266°, 338° C. 21/3(cos ? + i sin ?) for ? = 14°, 86°, 158°, 230°, 302° D. 2(cos ? + i sin ?) for ? = 14°, 86°, 158°, 230°, 302°
Solve the problem.A room measures 13 ft by 
The ceiling is 
above the floor. The door is 
by 
A gallon of paint will cover 87.2 ft2. How many gallons of paint are needed to paint the room (including the ceiling and not including the door). Round your answer up to the next whole number.
A. 9 gallons B. 3 gallons C. 21 gallons D. 12 gallons
Multiply.(x - 5)2(x - 5)2
A. x4 - 20x3 + 150x2 + 20x + 625 B. x4 - 5x3 + 150x2 - 250x + 625 C. x4 - 20x3 + 150x2 - 500x + 625 D. x4 - 20x3 - 250x2 - 500x + 625
If the number in the statement is written in scientific notation, write it without exponents. If it is written without exponents, write it in scientific notation.The speed of light is 1.86 × 105 miles per hour.
A. 18,600,000 B. 1,860,000 C. .0000186 D. 186,000