Answer:
Pythagoras theorem states that c²=a²+b²
14²=12²+x²
14²-12²=x²
196-144=x²
52=x²
√52=√x²
7.2111025509279785=x
rounded up to the nearest hundredth=7.21
The sum of two rational numbers will always be <u>rational</u>
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, therefore it will always be rational
check the picture below
5x-10= 3x+10
5x-3x= 10+10
2x÷2= 20÷2
x= 10