Answer:
DO PROPORTIONS
Step-by-step explanation:
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Answer: B) 18° C
Step-by-step explanation:
21+(-3) = 21 - 3
= 18
2(x4) = 35 - (7-4x)
+4x
2(x8)= 28
/2 /2
8x = 14
As both 4/2 and 5/2 are rational Numbers and Sum of rationals is a Rational Number.
Therefore, 9/2 is a Rational Number.