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lisov135 [29]
3 years ago
8

What is i30? A. 1 B. -i C. -1 D. i

Mathematics
1 answer:
Doss [256]3 years ago
5 0
B

Jksshsianhshsjssjsj
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a child find 29 nickels and dimes. how many dimes are there if the total value of the coins are $2.10?
DaniilM [7]
X represents nickels
y represents dimes
x+y=29
5x+10y=210
multiply the first equation by -5 (elimination method)
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then add the two equations together
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divide 5 from both sides
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Yesterday your bus ride to school took 10 minutes. Today your bus ride took 12 minutes. What is the percent of change?
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The percent of increase from 10 to 12 is 20 %. 10 x 1.2 = 12.

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