399.2 divided by 1\10 =??

Ответ:

ibrsayed6671

06.04.2021

3,992

Step-by-step explanation:

1/10 = 0.1

399.2/0.1 = 3,992

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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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