Respuesta :
15x64=960, 12x28=336, 960-336= 624. If I'm not completely wrong, 624 should be your answer.
Answer: There are 1296 crayons have been used altogether.
Step-by-step explanation:
Since we have given that
Number of boxes = 15
Number of crayons in each box = 64
So, Number of crayons in 15 boxes would be
[tex]15\times 64\\\\=960[/tex]
Number of boxes = 12
Number of crayons in each box = 28
So, Number of crayons in 12 boxes would be
[tex]12\times 28\\\\=336[/tex]
So, total number of crayons altogether would be
[tex]960+336\\\\=1296[/tex]
Hence, there are 1296 crayons have been used altogether.