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Tcecarenko [31]
3 years ago
10

• Which expressions are equivalent to 14a + 286?

Mathematics
1 answer:
Sveta_85 [38]3 years ago
7 0

Answer:

2(7a + 143)

what are the answers or are you asking us to find them

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It would be B. 120 you would usually round up but the closest one to 129.02083 is 130 and since there is no 130 it would be 120
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16d + 20c + 5d -7 - 8c - 7d + 3 Simplify the expression above:
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14d + 12c -4

Step-by-step explanation:

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3 years ago
Given: 1; -5; -13 ; -23 ; ...<br><br> Derive a formula for the nth term in the pattern.
mylen [45]

Answer:

  f(n) = -n^2 -3n +5

Step-by-step explanation:

Suppose the formula is ...

  f(n) = an^2 +bn +c

Then we have ...

  f(1) = 1 = a(1^2) +b(1) +c

  f(2) = -5 = a(2^2) +b(2) +c

  f(3) = -13 = a(3^2) +b(3) +c

__

Here's a way to solve these equations.

Subtract the first equation from the second:

  -6 = 3a +b . . . . . 4th equation

Subtract the second equation from the third:

  -8 = 5a +b . . . . . 5th equation

Subtract the fourth equation from the fifth:

  -2 = 2a

  a = -1

Then substituting into the 4th equation to find b, we have ...

  -6 = 3(-1) +b

  -3 = b

and ...

  1 = -1 +(-3) +c . . . . . substituting "a" and "b" into the first equation

  5 = c

The formula is ...

  f(n) = -n^2 -3n +5

3 0
3 years ago
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