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smiley29162

smiley29162

04.07.2019 •

Mathematics

How many dimes is there in 290 pennies

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Ответ:

stanleyt

25.05.2020

29 dimes are 290 pennies

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Ответ:

maybeemmamay

07.06.2021

$\frac{7}{8}$ feet

Step-by-step explanation:

Total length of the 3 pieces of rope = $3\frac{1}{2}$ feet.

Length of the first piece of rope = $1\frac{3}{4}$ feet.

Length of the second piece of rope = $\frac{7}{8}$ feet.

Let the length of the third piece = x

$1\frac{3}{4}+ \frac{7}{8} + x =3\frac{1}{2}\\ \frac{7}{4}+ \frac{7}{8} + x =\frac{7}{2}\\$

Lets multiply all through by the LCM of 2, 4 and 8 which is 8

14+7+8x=28

21+8x=28

8x=28-21

8x=7

$x=\frac{7}{8}$

The length of the third piece is $\frac{7}{8}$ feet

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