Sophia gave 1/2 of her semi-precious-rock collection to her son. she gave 1/2 of what she had left to her grandson. then she gave 1/2 of what she had left to her great-grandson. she kept 10 rocks for herself. how many rocks did she have in the beginning?

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.

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right

b.   e = 7.5h

hope this , lovely!

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step-by-step explanation:

equals the constant of proportionality.

solve for