Answer please due today

4. a spring scale is constructed so that each 0.10-n increment is separated by 0.50 cm. what spring constant is necessary for the scale to be accurate? -1.0n/cm -0.10n/cm -9.8 n/cm -0.20n/cm

How do you use the elimination method for this question? explain, because i really want to understand!

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are: