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13-08-2018
Mathematics

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C.6
D.5
Geometry math question no Guessing

C6 D5 Geometry math question no Guessing class=

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musiclover10045 musiclover10045

13-08-2018

Set up a ratio 50 / 130 = x+19 / 78

Cross multiply:

50 * 78 = 130 * x+19

3900 = 130(x+19)

Use the distributive property:

3900 = 130x + 2470

Subtract 2470 from each side:

1430 = 130x

Divide both sides by 130

x = 1430 / 130

X = 11

The answer is B. 11

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