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02.04.2020 •
Mathematics
Which of the following expressions is equal to
-4x^2-36?
A. (-4x-9i)(x-4i)
B. (-4+12i)(x-3i)
C. (-4x+9i)(x-4i)
D. (-4x-12i)(x+3i)
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Ответ:
Lory has 49 marbles.
Solution:
Number of marbles Lory had before her birthday = 56
Number of marbles Lory got on her birthday = 15
On adding both the above values we get the total number of marbles.
Total number of marbles Lory has =
Number of marbles Lory gave away = 22
On subtracting the number of marbles given by Lory from the total number of marbles we get the number of marbles left with Lory
i.e, Number of marbles left with lory =
Thus, number of marbles left is 49.