What is the most effective method for solving the system
x-3=y 2(x-3)-y=7​

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One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25