Multiply by (r^2)/F and take the square root.
(r²/F)·F = G·(m×M)/r²·(r²/F)
r² = G·m·M/F

Answer:
x=122°
Step-by-step explanation:
sum of all interior angles in a quadrilateral = 360°
then ,
119+105+78+m = 360
m = 58
....
m+ x = 180 ( linear pair)
58+x = 180
x = 122
He chose the right type of equation equation, but the equation should be y=15/x
Im on sure but probably 0.75