Heres the rest of the paper!

Step-by-step explanation:

No . 7

y = K X ( this ithe equation ,need to find K )

12 = k × 1/3

k=12 x 3 = 36

y= 36 X → ( equation

No . 8)... the same Way

k = 21 / 14= 3 / 2

y= 3/2 X

NO . 9

X 1/ X 2 = y1 / y 2

4 /10 = -10 / y 2

y2 = -25

No. 10

x 1 / X2 = y1 / y 2

.48 / X2 = 36 / 18X

X2 = 24

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons