Plz help me

I want to solve the two questions in the picture plz

d

step-by-step explanation:

d

alright well the answers to your question is

2xy/9 hope this have a nice day : )

step-by-step explanation:

i believe a. 12x≥120 is the answer

1. 16.64

a^2+b^2=c^2

pr^2=pq^2+qr^2

pr^2=14^2+ 9^2

pr^2=196+81

pr= sqr root of 277

16.64

2. 11.31

c^2-a^2=b^2

18^2- 14^2=b^2

b^2=324-196

b=sqr root of 126

b=11.31

hope it ! (btw im in connections academy to, good luck! )