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Mathematics
Mathematics
Problem
If
a
<
b
a<b
a
<
b
, which of the following inequalities is always true after performing the stated operation on both sides? a)
−
2
a
<
−
2
b
-2a<-2b
−
2
a
<
−
2
b
b)
a
+
5
>
b
+
5
a+5>b+5
a
+
5
>
b
+
5
c)
a
+
5
<
b
+
5
a+5<b+5
a
+
5
<
b
+
5
d)
a
−
3
<
b
−
3
\dfrac{a}{-3}<\dfrac{b}{-3}
−
3
a
<
−
3
b
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