3 years ago

If five notebooks cost $5.25 how much would three notebooks cost

Mathematics

2 answers:

Lelu [443]3 years ago

8 0

3 notebooks would cost $3.15

Setler79 [48]3 years ago

3 0

Okay first you divide 5.25/5 which gives you 1.05 then you multiply 1.05 by 3 which would give you $3.15 for 3 notebooks.

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Ede4ka [16]

$\left[\begin{array}{ccc}22&18\end{array}\right]\times\left[\begin{array}{cccc}5&18&32&40\\25&40&38&12\end{array}\right]\\\\=\left[\begin{array}{cccc}22\cdot5+18\cdot25&22\cdot18+18\cdot40&22\cdot32+18\cdot38&22\cdot40+18\cdot12\end{array}\right]\\\\=\left[\begin{array}{cccc}560&1116&1388&1096\end{array}\right]$

second question:

January: 32 · 22 + 38 · 18 = 704 + 684 = 1388

December: 18 · 22 + 40 · 18 = 396 + 720 = 1116

1388 - 1116 = 272

Answer: $272.

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3 years ago

How to write 18,165,411 in word form

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