angie249
12.07.2019 •
Mathematics
Mary is 12 years old now, and is three times older than her sister. how old will mary be when she is twice as old as her sister?
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Ответ:
Her sister's age:4
Mary's age will be 8
Because Mary is 12 years old, and is three times older than her sister.
So 12 divided by 3 is equal to 4
And 4×2=8
Ответ:
$525
Step-by-step explanation:
72%x=378
0.72x=378
378/.72=525