Question

1. Simplify each of the following:
(a) -25 + 12 = (9-3)
(b) 29 - [38 - {40 = 2-(6-9=3) - 3}]
C) 14 – {13 +2 - (7 +5 - 2 +3 ); (d) 14+][{–10 (25 – 13 – 3)} = (-5)]
(C) 27 -1 4-5-(-48) = (-16)​

Answer 1

Answer:

hey

Step-by-step explanation:

15+18389393

Give reason:

a) Ionic compounds required more energy to break down as compare to covalent compounds.

b) Solid state of an ionic compound doesn't conduct electricity.

c) Why do we need to add 0.05% carbon with iron to make bridges and railway tracks.

d) Silver articles become black when react with sulphur.

e) Brown flaky in the surface of iron rod when exposed to moisture and air. ywj849262552☺☺☺

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