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vlada-n [284]
3 years ago
8

Pedro solves the quadratic equation x^2+6x –14 using the quadratic formula. In which step did Pedro make an error?

Mathematics
1 answer:
Nutka1998 [239]3 years ago
3 0

9514 1404 393

Answer:

  correct choice is marked

Step-by-step explanation:

The error is in step 2. The square root cannot be distributed to a sum.

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irinina [24]

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Step-by-step explanation: supplementary means 180 so you do 180-105 which is 75

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This is due tomorrow and i have answers but i think ive done it wrong! please help
Eva8 [605]

Answer:  i) 1 - 9x² - 12x

               ii) 17 - 3x²

             iii) - 20 + 10x² - x⁴

<u>Step-by-step explanation:</u>

g(x) = 3x + 2       h(x) = 5 - x²

i) h(g(x))

  h(3x + 2) = 5 - (3x + 2)²

                  = 5 - (9x² + 12x + 4)

                  = 5 - 9x² - 12x - 4

                  = 1 - 9x² - 12x

ii) g(h(x))

   g(5 - x²) = 3(5 - x²) + 2

                 = 15 - 3x² + 2

                 = 17 - 3x²

iii) h(h(x))

   h(5 - x²) = 5 - (5 - x²)²

                 = 5 - (25 - 10x² + x⁴)

                 = 5 - 25 + 10x² - x⁴

                 = -20 + 10x² - x⁴

4 0
3 years ago
Marianna is painting a ramp for the school play in the shape of a right triangular prism. The ramp has dimensions as shown below
garri49 [273]
32 and 44 I hope I got it right
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The standard form would be y = 7x^2 - 42x + 67
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Answer:

C) ∠R

Step-by-step explanation:

they both have two marks, meaning they are congruent

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