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Norma-Jean [14]
3 years ago
10

John has 54 marbles. some are red and some are black. The ratio of the number red marbles to black are 7:2. How may more red tha

n black are there?
Mathematics
1 answer:
Mkey [24]3 years ago
3 0
Red : Black : Total 
7 : 2 : 7+2 
7 : 2 : 9

9x = 54
1x = 54÷9 = 6
7x = 7x6 = 42
2x = 2x6 = 12

Red : Black
42 : 12

42 - 12 = 30 
There are 30 more red than black


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Step-by-step explanation:

To solve this right triangle, you can use trigonometric ratios to solve for the sides. To find the angle measures:

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180 - (46 + 90) = x

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To find the side measures, you can use tangent, sine, cosine, and the Pythagorean Theorem.

Recall that:

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