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natulia [17]
2 years ago
13

Can someone please help with this ?

Mathematics
1 answer:
creativ13 [48]2 years ago
4 0

Answer:     -9n+20

This is the same as 20-9n

================================================

Explanation:

The jump from 11 to 2 is "minus 9"

The jump from 2 to -7 is also "minus 9".

Assuming this pattern continues on, we have an arithmetic sequence with

  • a = 11 = first term
  • d = -9 = common difference

The nth term can be found like so

a_n = a + d(n-1)\\\\a_n = 11 + (-9)(n-1)\\\\a_n = 11 -9n + 9\\\\a_n = -9n+20\\\\

Let's check the answer by trying n = 3

a_n = -9n+20\\\\a_3 = -9*3+20\\\\a_3 = -27+20\\\\a_3 = -7\\\\

This shows the third term is -7, which matches what the original sequence shows. The answer is partially confirmed. I'll let you check the other values of n. You should get 11 when trying n = 1, and you should get 2 when trying n = 2.

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Find CD, please i need help
Sidana [21]

You are given the full length and the lengths of all the sections other than CD.

Subtract the given sections from the entire length to get CD.

12 1/2 - 6 1/2 = 6

CD = 6

4 0
3 years ago
Pls answer this question
inn [45]

Answer:

1.9391 is ur questions answer

3 0
2 years ago
Which expressions represent a quadratic expression in factored form?
Bingel [31]

Answer:

3 and 4

Step-by-step explanation:

Well to start we have to know that they are asking us, a factorized form of a quadratic expression

a quadratic expression is of the form

ax ^ 2 + bx + c

Now the factored form is as follows            

 a ( x - x1 )  ( x - x2 )

Next, let's look at each of the options

In this case we lack a term with x since if we solve we have a linear equation

1.    5(x+9)

  5x + 45

In this case if we pay attention they are being subtracted instead of multiplying, so we will not get a quadratic function

2.    (x+4) - (x+6)

       -2

In this case we have everything we need, now let's try to solve

3.     (x-1) (x-1)

      x^2 - x - x + 1

      x^2 - 2x + 1       quadratic function

In this case we have everything we need, now let's try to solve

4.     (x-3) (x+2)

        x^2 -3x +2x -6

         x^2 -x - 6    quadratic function

In this case we have a quadratic function but we do not have it in its factored form since we can observe the x ^ 2

5.     x^2 + 8x

8 0
3 years ago
Help me please I don’t u understand
german

Answer:

Step-by-step explanation:

s=18, t=18 the s gives t x sweets

s=18-x, t=18+x, s eats 5 and t eats half

s=18-5-x, t=(18+x)/2

Reamining sweets is

R=s+t

R=18-5-x+(18+x)/2

R=13-x+(18+x)/2

R=(26-2x+18+x)/2

R=(44-x)/2

4 0
3 years ago
Dylan and Abigail are both driving along the same highway in two different cars to a stadium in a distant city. At noon, Dylan i
Tju [1.3M]
Your profile picture is very uncool man
8 0
3 years ago
Read 2 more answers
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