They are 6, 8, 10, 12 years old.
all of those added is 36 and two-year intervals translates to 2 years apart per cousin.
Answer:
20 boxes
Step-by-step explanation:
10 boxes are 137.5kg
=> the number of boxes can add :
(450-137.5)/15.5 = 20 (boxes)
5b= 10
12/b= 6
84/(2)=42
Those are some equations where b=2 is true.
Answer:
98
Step-by-step explanation:
(2a +
)² = 4a² + 2 +
, thus
10² = 4a² + 2 +
( subtract 2 from both sides )
100 - 2 = 4a² +
, that is
4a² +
= 98