Let matrices a, b represent complex numbers. answer the following questions.
a. let a = −b
b a
and b = −
c
show a= b through matrix multiplication.
b. would you expect a = c for any matrix c? explain.
c. let c be any 2 × 2 matrix,
x y
z show a ≠ c through matrix multiplication.
d. summarize your results from problems 3 and 4.

Consider symmetrically placed rectangular insulators with uniformly charged distributions of equal magnitude as shown. x y −−−−−− what is the direction of the net field at the origin?

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.