Which arithmetic sequence has a first term equal to 47 and a common difference of -18? a. {47, 29, 11, -7, …}
b. {47, 65, 83, 101, …}
c. {-18, 29, 76, 123, …}
d. {-18, -65, -112, -159, …}

the line of

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.