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Ghella [55]
4 years ago
10

What quadratic has roots of x=8 and x= -5

Mathematics
1 answer:
Alexxx [7]4 years ago
6 0

Answer:

The quadratic is f(x) = x² - 3x - 40

Step-by-step explanation:

If the roots are x=8 and x= -5, the factors are (x - 8) and (x + 5).

The quadratic is then:

f(x) = x² + 5x - 8x - 40, or x² - 3x - 40

The quadratic is f(x) = x² - 3x - 40

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NEED ANSWER ASAP!!!!
lesya692 [45]

Answer:

1st option

Step-by-step explanation:

To find the difference of the given matrices, we just need to subtract the corresponding elements of the two matrices as shown below:

\left[\begin{array}{cc}-4&8\\3&12\end{array}\right] -\left[\begin{array}{cc}2&1\\-14&15\end{array}\right] \\\\ \\ =\left[\begin{array}{cc}-4-2&8-1\\3-(-14)&12-15\end{array}\right]\\\\ \\ =\left[\begin{array}{cc}-6&7\\17&-3\end{array}\right]

Thus, 1st option gives the correct answer

7 0
4 years ago
Read 2 more answers
Devin’s friend Ryan lives 2 blocks west and 5 blocks south of Devin. Devin’s friend Andy lives 7 blocks east and 2 block north o
My name is Ann [436]

Answer:

≈11.4

Step-by-step explanation:

We know that, Ryan lives 2 blocks west and 5 blocks south of Devin

=> Coordinate of Ryan: (-2,-5). Because:

  • 2 blocks west = 2 unit to the left = -2
  • 5 blocks south = 5 unit go down= -5

Andy lives 7 blocks east and 2 block north of Devin.

=>Coordinate of Andy: (7,2), because:

  • 7 blocks east = 7 unit ti the right = 7
  • 2 block north = 2 unit go up = 2

Hence, to find out the distance of Ryan and Andy, we use distance formula as below:

\sqrt{(2+5)^{2} + ((7+2)^{2} }  ≈11.4

3 0
3 years ago
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Solve the inequality for u. 55 > 4u + 15 Simplify your answer as much as possible.​
valentinak56 [21]

Step-by-step explanation:

55 > 4u + 15

40 > 4u

10 > u

so, this is true for all u < 10

4 0
3 years ago
PLS HELP ME THIS IS HARDD
pogonyaev

Answer:

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Step-by-step explanation:

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A d + b = 180
serg [7]
I know B is true, but i’m unsure for the other choices.
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3 years ago
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