Find the mistake, then find the correct answer.Solve for x: x2 - 2x + 4 = 0 line 1x = 
line 2 x = 
line 3 x = 
What will be an ideal response?
The solution is incomplete. The result in line 3 can and should be simplified to 
therefore x is not a real number.
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 
B. -4
C. 2
D. - 
Simplify. Do not use negative exponents in your answer.(y-6z-4)(y-1z-5)
A. 
B. 
C. y5z9
D. 
Solve the problem.A rectangular garden has dimensions of 17 feet by 9 feet. A gravel path of consistent width is to be built around the garden. How wide can the path be if there is enough gravel for 456 square feet?
A. 8 ft B. 7 ft C. 8.5 ft D. 6 ft
The light bulbs produced by a generic manufacturer have a stated average life of 1,432 hours. Assume that the lifetimes of the bulbs are normally distributed with a standard deviation of 120 hours. Find the probability that a light bulb from this manufacturer will last longer than 1642 hours. Round your answer to three decimal places.
a. 0.960 b. 0.920 c. 0.040 d. 0.460 e. 0.540