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My name is Ann [436]
3 years ago
10

Question 8 of 14

Mathematics
2 answers:
diamong [38]3 years ago
7 0

Answer:

144.

Step-by-step explanation:

Sum of n terms = (n/2)[a1 + l]    where a1 = first and l = last term.

There are ( 1 + 23) / 2 = 12 terms in this series.

So  the sum = (12/2) [ 1 + 23]

= 6 * 24

= 144.

Oxana [17]3 years ago
3 0

Answer:

276 is correct

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Y = -x + 4.....so sub in -x + 4 in for y in the other equation

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x = 16

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y = -16 + 4
y = - 12

one solution (16,-12)
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Answer

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3 years ago
Lines n and m are parallel and lines s and t are parallel, as shown.
bekas [8.4K]

Answer:

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6 0
3 years ago
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? need in a day or 2 please! Is worth 23 points and brainiest!
Marta_Voda [28]
The answer is 60 feet.

Step by step explanation:

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Final answer:
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