A data set has a mean of 42 and a standard deviation of 7.8 if an element in the set is 54 find its z-score

In the diagram, gef and hef are congruent. what is the value of x

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

Landon drove 103.5 miles on tuesday 320.75 miles on wednesday and 186.30 miles on thursday for work his company pays 0.07 $ for each mile he drives he expects to be paid more than $40,000 is he correct explain