jolancunningham
25.02.2021 •
Mathematics
Q15: TWENTY YEARS AGO, A PERSON'S AGE WAS ONE
THIRD HIS PRESENT AGE. HIS PRESENT AGE IS:
30 YEARS
20 YEARS
O
O
O 10 YEARS
16 YEARS
Solved
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Ответ:
30?
Step-by-step explanation:
Ответ:
Exact response: Use the associative property to move the parentheses, and the expression becomes (d + 8d) + 1 + 7. Combine like terms, and the expression becomes 9d +8. Use the commutative property to change the order of the terms, and the expression becomes 8 + 9d.