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Sever21 [200]
2 years ago
10

Completing the square x^2-19x-42=0

Mathematics
2 answers:
Ugo [173]2 years ago
8 0

Answer:

x = 2

x = -21

Step-by-step explanation:

Mrac [35]2 years ago
7 0

Answer:

{x}^{2}  - 19x - 42 = 0 \\  {x}^{2}  + 2x - 21x - 42 = 0 \\ x(x + 2) - 21(x + 2) = 0 \\ (x + 2)(x - 21) = 0 \\  \boxed{x =  - 2} \\  \boxed{x = 21}

<h3>(x+2) and (x-21) is the factors of the x²-19x-42.</h3><h3>Value of x is -2 and 21.</h3>
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3 kilograms of red hots and I
MrRa [10]

Answer:

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
I need help with this problem,
emmasim [6.3K]

Answer:

  JL = 78

Step-by-step explanation:

The shorter segment is a midline, so is half the length of the longer one.

  2(5x-16) = 4x +34

  5x -16 = 2x +17 . . . . . divide by 2

  3x = 33 . . . . . . . . . . add 16-2x

  x = 11 . . . . . . . . . . divide by 3

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4 0
2 years ago
Can I get help with this please
drek231 [11]

Answer:

3)  1 5/6 mi

4)  a. 4 cm, 6 ft

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    c. same as part a

Step-by-step explanation:

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___

4) Since the figure is rectilinear (all angles are right angles, and all sides are straight lines), the sum of partial dimensions in one direction is equal to the whole dimension in that direction.

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The distance in the room is ...

  (6.4 cm)×(1.5 ft/cm) = 9.6 ft

c. The answer to part b was obtained in the same way as the answer to part a.  The unknown dimension is the difference of given dimensions. The actual length in the room is the model length multiplied by the inverse of the scale factor.

3 0
3 years ago
If a man walks for 6 miles a steady speed of 3 mph, how long will it take him
Mrrafil [7]
I think you need to divide
6 0
2 years ago
Read 2 more answers
What is this answer?? : [6.6 ÷ (–5 + 3)] • (–1)
Mars2501 [29]
Your answer is 3.3

-Hope I helped you. :)
3 0
2 years ago
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