Given that f(x) = 4x + 7 and g(x) = 3x - 5. If fog=1 = 15, find the value oſ r.​

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! )

what are the answer choices given for this problem?

a king of hearts and a 2 of spades

i have no clue i hate math i just need the points to get my answers