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Triss [41]
2 years ago
10

Please help me!!!!!!!!!!!!!!!

Mathematics
1 answer:
kiruha [24]2 years ago
6 0
Pretty sure its adjacent (2)
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-9 - (-4) = <br> What does that equal to?
CaHeK987 [17]

Answer:

-5

Step-by-step explanation:

When you subtract a negative you end up adding it instead

5 0
2 years ago
Need help on this!!!!
Alexxandr [17]

Answer:

It's the first one.

Step-by-step explanation:

7 0
2 years ago
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Matt bought 8 pie molds at a cost of $0.67 per mold. He also bought 8 pre-
kupik [55]

Answer:

$5.36

Step-by-step explanation:

multiply 8 by .67

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3 years ago
Write the polynomial in factored form as a product of linear factors f(r)=r^3-9r^2+17r-9
adelina 88 [10]

Answer:

  f(r) = (x -1)(x -4+√7)(x -4-√7)

Step-by-step explanation:

The signs of the terms are + - + -. There are 3 changes in sign, so Descartes' rule of signs tells you there are 3 or 1 positive real roots.

The rational roots, if any, will be factors of 9, the constant term. The sum of coefficients is 1 -9 +17 -9 = 0, so you know that r=1 is one solution to f(r) = 0. That means (r -1) is a factor of the function.

Using polynomial long division, synthetic division (2nd attachment), or other means, you can find the remaining quadratic factor to be r^2 -8r +9. The roots of this can be found by various means, including completing the square:

  r^2 -8r +9 = (r^2 -8r +16) +9 -16 = (r -4)^2 -7

This is zero when ...

  (r -4)^2 = 7

  r -4 = ±√7

  r = 4±√7

Now, we know the zeros are {1, 4+√7, 4-√7), so we can write the linear factorization as ...

  f(r) = (r -1)(r -4 -√7)(r -4 +√7)

_____

<em>Comment on the graph</em>

I like to find the roots of higher-degree polynomials using a graphing calculator. The red curve is the cubic. Its only rational root is r=1. By dividing the function by the known factor, we have a quadratic. The graphing calculator shows its vertex, so we know immediately what the vertex form of the quadratic factor is. The linear factors are easily found from that, as we show above. (This is the "other means" we used to find the quadratic roots.)

7 0
3 years ago
What is the quotient of 22,389 and 13?
Tatiana [17]
1,722.23077. If I am correct, because 22,389 divided by 13 is 1,722.23077.
6 0
3 years ago
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