Find a value of k for which the following system has only one solution: 2x+y=7 y−kx=3

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

27 is what percent of 108? 27 is % of 108

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.