Un observateur placé à 3 m d'un clocher le voit you un angle de 40 degrés . Quare est la
hauteur du clocher?
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Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion