Select the correct answer from each drop-down menu.
a system of equations and its solution are given below.

system a

x-y=3
-2x+4y= -2

solution: (5,2)

complete the sentences to explain what steps were followed to obtain the system of equations below.

system b
x-y=3
2x=10

to get system b, the ? equation in system a was replaced by the sum of that equation and the ? equation multiplied by ? . the solution to system b ? the same as the solution to system a.

fill in the blank where the question marks are.

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Is a positive integer raised to a negative power always positive

Need now 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.