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bogdanovich [222]
3 years ago
8

What is the sum of the first five terms in the series 7+12+17+..?

Mathematics
1 answer:
nirvana33 [79]3 years ago
3 0
7 + 12 + 17 + 22 + 27 = ( 7 + 27 ) + ( 12 + 22 ) + ( 34 / 2 ) = ( 34 / 1 ) + ( 34 / 1 ) + ( 34 / 2 ) = ( 68 / 2 ) + ( 68 / 2 ) + ( 34 / 2 ) = 170 / 2 = 85 .
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Lizzie has 30 coins that total $4.80. All of her coins are dimes, D, and quarters, Q. Algebraically determine how many of each t
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Lizzie has 18 dimes and 12 quarters

<em><u>Solution:</u></em>

Let "d" be the number of dimes

Let "q" be the number of quarters

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number of dimes + number of quarters = 30

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Also given that the coins total $ 4.80

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Substitute eqn 3 in eqn 2

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From eqn 3,

d = 30 - 12

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