Yvaries directly as x and inversely as the square of z. y=48when x=100 and z= 5. find y when x=3 and z=12

In djkl, side jk measures 10.6 inches, side kl measures 7 inches, and side jl measures 5 inches. based on the information that is provided, which could be a correct set of angle measures for these sides? angle j = 23.2°, angle k = 33.5°, angle l = 23.2° angle j = 23.2°, angle k = 33.5°, angle l = 123.2° angle j = 123.2°, angle k = 23.2°, angle l = 33.5° angle j = 33.5°, angle k = 23.2°, angle l = 123.2°

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Pls! does anybody know a shortcut for answering these types of questions in the future?