Answer: The Answer is 10
Step-by-step explanation:
Answer:
area (A) =(9x+108)unit^2
perimeter (P) =(2x+42) units
Step-by-step explanation:
area(A) =length(l) × breadth(b)
perimeter(P) =2(l+ b) {which is sum of all sides}
so, l = 7+x+5 = (x+12) units and b = 9 units
now, A=(x+12) × 9 units^2
=(9×x + 12×9 ) units^2
Therefore,
A =(9x+108)unit^2
next, P=2{(x+12)+9}
=2(x+21)
Hence,
P=(2x+42) units
Answer: B
Step-by-step explanation:
Since 
, it follows that 
Answer:
Sydney is 21 years old
Step-by-step explanation:
1. subtract 11 from 53 (53-11=42)
2. divide the difference by 2 (42/2=21)
