Find the solution of this system of equations -9x - 2y= -55 -6x - 4y= -26

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'