Answer:
Karen is 71 years old
Step-by-step explanation:
Known
Karen=Jack +35
Frank=1/2 Jack
Jenifer=Frank+17
If Jenifer=35
35=Frank+17
18 = Frank
18=1/2 Jack
36= Jack
Karen= Jack+35=36+35=71
It means to convert 3liters to mL
400g to kg
And so as the following
X = 8.5 because 8.5 x 2 = 17 and 17 + 1 = 18