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umka21 [38]
3 years ago
11

Please help me answer these questions!

Mathematics
2 answers:
FromTheMoon [43]3 years ago
5 0
I'm pretty sure the answer is 259
Alex Ar [27]3 years ago
3 0
The first term is 6^0 = 1. The common ratio r is 6. There are 4 terms in the series.

Using the formula for sum of geometric series S = a(1-r^n)/(1-r),

S = (1-6^4)/(1-6) = 259
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Which expression is NOT equivalent to 12x + 18y?
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Answer:

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Step-by-step explanation:

3 (4x + 18y) means that 3 will multiply 4x and 18y factor which results to 12x + 54y

hence dissimilar to the original expression

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Cho tam giác ABC vuông tại A đường giao AH biếtAH=12cm BH=9cm.<br><br>Tính diện tích tam giác ABC
Lostsunrise [7]

Answer:

Step-by-step explanation:

AB^2 = HB^2 + AH^2 => AB = 15cm

Ta co cong thuc: 1/AH^2 = 1/AB^2 + 1/AC^2 => AC=20cm

Vay SABC= 1/2 .AB.AC = 1/2 .15.20=150cm^2

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Liula [17]
The answer to the question is 0.6
7 0
3 years ago
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Mr. Rodriguez works in a store. He wants to arrange 12 toys in a display shaped like a rectangular prism. The toys are in cube-s
Vilka [71]
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There are 6 possibilities.
4 0
3 years ago
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