Well if I did the right calculations... Kim is 24. The sister is age twelve! Hope I helped.
A. K+S=36
B. Well Simple Addition and Subtraction solves this easily. If you Add 12+12 it equals 24. It still needs to be larger so that Kim is twice as old as her little sister. So you Add another 12 which gives you 36. Or you can easily subtract 12 from it and that will also bring you to 24.
Answer: The equation that can be used to find x, is given by

Step-by-step explanation:
Let the number of degrees he lowered the temperature by each time be 'x'.
Temperature he starts with = 12.2° C
Temperature he stopped with = -14.61° C
According to question, it is said that he lowers the temperature 5 times by the same amount each time.
So, it becomes,

Hence, the equation that can be used to find x, is given by

Market value = $310,000
Since market value for tax purposes is 40% of the actual market value,
Market value for tax assessment = $310,000*40% = $124,000
Tax rate per $1000 of assessed valuation = $145.10 or 14.51% of the assessed value
Hence tax to be paid by leo = $124000*14.51% = $17992.40