When multiply or divide an inequality by a negative number, flip the direction of the sign (ex, from < to > or vice verca)
28>4-2p
minus 4 from both sides
24>-2p
divide both sides by -2 and don't forget to flip the sign
-12<p
p>-12
Jose lost 120
50-120= -70
Ling lost 80
50-80= -30
Ling won because he had -30 while Jose had -70
Answer:
Principle for account B is greater.
<em></em>
Step-by-step explanation:
First of all, let us have a look at the formula for Simple Interest:
Where 
is the principle amount
is the Rate of interest per annum
is the time in years.
Time = 21 months = 
Let the Principles be 
.
Using the formula for Simple Interest, we get:
Therefore, <em>principle for account B is greater</em>.
Isolate the radical, then raise each side of the equation to the power of its index.
Exact Form:
x
=
3
+
√
5
2
,
3
−
√
5
2
x
=
3
+
5
2
,
3
-
5
2
Decimal Form:
x
=
2.61803398
…
,
0.38196601
…
