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IrinaK [193]
3 years ago
13

Write the word sentence as an equation. Then solve.

Mathematics
1 answer:
natima [27]3 years ago
5 0

Answer:25x=320=12.8

Step-by-step explanation:

a number=x

x*25=25x

25x=320

320/25=12.8

x=12.8

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The sum of the first three terms of a sequence is 6 and the fourth term is 16
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              a₁ = -5, d = 7,  a₂ = 2, a₃ = 9, a₄ = 16

equation of sequence:    \boxed{\bold{a_n=7n-12}}

Step-by-step explanation:

a₁ + a₂ + a₃ = 6    

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