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Vladimir [108]
4 years ago
8

Number 8 please. I don't understand. Thank you.

History
1 answer:
Licemer1 [7]4 years ago
7 0

Givens

The ratio give is 7 (black) to 2 white)

The total number of beads is 54

Ratio

The best way to do this is to change the ratio to Black: Total

The total number of beads can be represented by 9 as the denominator in the ratio.

Black to total = 7 / 9

Formula

7/9 = x / 54 where x is the number of black beads.

Solution

Multiply both sides by 54

7/9 * 54 = x/54*54                  Simplify

7 * 6       = x                              9 goes into 54 six times. Combine the right

42 = x                                    

Number of beads by color.

Black: 42

White: 54 - 42 = 12

Answer

There are 42 - 12 = 30 more black beads than white.

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