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Darina [25.2K]
2 years ago
5

Help please.with the stepson image.​

Mathematics
1 answer:
Kipish [7]2 years ago
5 0

Answer:

  • T(n) = 3n² - 4
  • -189 doesn't belong

Step-by-step explanation:

<u>Given sequence:</u>

  • -1, 8, 23, 44, 71

<u>The first differences:</u>

  • 9, 15, 21, 27

<u>The second differences:</u>

  • 6, 6, 6

<u>If the sequence is T(n) = an² + bn + c, we have:</u>

  • 2a = 6 ⇒ a = 3

<u>Using the first and second differences work out  the value of zero term:</u>

  • 9 - 6 = 3
  • -1 - 3 = -4

This gives us c = - 4

<u>Now we have:</u>

  • T(n) = 3n² + bn - 4

<u>The first term is T(1) = -1, substitute n = 1 and find the value of b:</u>

  • 3(1²) + b*1 - 4 = - 1
  • 3 + b - 4 = - 1
  • b = 0

<u>The nth term is:</u>

  • T(n) = 3n² - 4

<u>Now lets find if -189 belongs to this sequence:</u>

  • - 189 = 3n² - 4
  • 3n² = - 185

The left side is positive and the right side is negative so the answer is also negative

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Reasoning Graph the set of ordered pairs (0, 2). (1.4), (2,6). (3.8). Determine whether the relationship is a linear function Ex
polet [3.4K]

Answer:

No, it does not. See below.

Step-by-step explanation:

Lets find out the linear equation that passes trough (-2, 0) and (0, -6).

We know every linear equation has the form: y = mx + b

Where m is the slope on the curve and b the independent term.

We know that, given 2 points (x1,y1) and (x2,y2) we can find the slope m as:

m = (y2-y1)/(x2-x1)

In our case lets replace (x1,y1) and (x2,y2) by (-2, 0) and (0, -6) (notice it could be done in the inverse sense where (-2, 0) is (x2,y2) and (0, -6) is (x1,y1) ). So, our slope is:

m = [-6 - 0] / [0 - (-2)]

m = -6/2 = -3

So, we have a downward linear function with slope -3, this is:

y =  -3x + b

Now, for finding b just replace any of the 2 points given in the equation. Lets replace (-2, 0):

0 = -3(-2) + b

0 = 6 + b

Subtracting 6 in both sides:

-6 = b

So, our independent term is -6 and the function is:

y = -3x - 6

Now lets see if this linear eqution passes trough (2,6). If it does, we can replace the values on the equation. Replacing x by 2:

y = -3(2) - 6 = = -6 - 6 = - 12

So, in our equation, we x is 2 y is -12, and not 6 as in the point (2,6). So, our equation does not passes trough (2,6)

5 0
2 years ago
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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

We know that 38 players can fit into 4 groups, 8 times ...

32 divide 8 = 4

We have the number with 96, and we need to find the groups

we do the same as done with the first one...

because 32 divided by 8 is 4

we do

96 divide 8 = 12

aswell

<h2><u><em>hope this helped : )</em></u></h2>
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3 years ago
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storchak [24]

Your answer would be 4.

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Hope it helps!

3 0
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