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Luda [366]
3 years ago
7

Which Roman numeral is equivalent to the number below?

Mathematics
1 answer:
In-s [12.5K]3 years ago
7 0

I = 1

II = 1 + 1 = 2

V = 5

VI = 5 + 1 = 6

IV = 5 - 1 = 4

X = 10


A. XVIII = 10 + 5 + 1 + 1 + 1 = 18


B. VII = 5 + 1 + 1 = 7


C. XXVII = 10 + 10 + 5 + 1 + 1 = 27


D. XVII = 10 + 5 + 1 + 1 = 17


Answer: D. XVII

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<h3><u>Solution:</u></h3>

Given that It cost 5 dollars for a child ticket and 8 dollars for a adult ticket

cost of each child ticket = 5 dollars

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Let "c" be the number of child tickets bought

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<em>Number of child tickets bought + number of adult tickets bought = 110</em>

c + a = 110 ----- eqn 1

<em><u>Also we can frame a equation as:</u></em>

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5c + 8a = 820 -------- eqn 2

Let us solve eqn 1 and eqn 2 to find values of "c" and "a"

From eqn 1,

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Substitute eqn 3 in eqn 2

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-3c = - 60

c = 20

Therefore from eqn 3,

a = 110 - 20 = 90

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