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pickupchik [31]
3 years ago
6

Help me with math please

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

(-3^3+2 · -2^2)^2-4^4

(-27+2 · -4)^2-4^4

(-27+(-8))^2-4^4

-35^2-4^4

1225-256

969

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A baseball team had 28 hime runs last year. This year they have 20 homeruns. What was the percent of change
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Answer:

28.57% drop

Step-by-step explanation:

Number of runs

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  • This year = 20

Change this year:

  • 28 - 20= 8

Change %:

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3 years ago
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Answer:

  • The function is injective but nor surjective

Step-by-step explanation:

<u>We see that:</u>

  • f(x) = x³

<u>For any x₁ and x₂ ∈ N, </u>

  • f(x) = x₁³ = x₂³ ⇒ x₁ = x₂, both are natural numbers

It it confirmed one-to-one, hence it is injective

<u>Check the surjectivity:</u>

f(x) = y ∈ N

  • x³ = y
  • y = ∛x

<u>Let y = 2, then:</u>

  • 2 = x³
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Since x is not natural, the function is not surjective

6 0
2 years ago
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How do i tell if y=x^3+x^2 is even or odd?
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If a function is even, then f(-x) = x.

If a function is odd, then f(-x) = -x.

y = x³ + x² → f(x) = x³ + x² → -f(x) = -(x³ + x²) = -x³ - x²

f(-x) = (-x)³ + (-x)² = [(-1)(x)]³ + [(-1)(x)]² = (-1)³x³ + (-1)²x²

= -1x³ + 1x² =-x³ + x²

f(-x) ≠ f(x) and f(-x) ≠ -f(x)

y = x³ + x² is not odd and not even

Answer: neither

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The answer would be c .
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