I will give brainiest to whoever answers correctly !!

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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2