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stellarik [79]
2 years ago
7

The sum of a certain number and -3.4 is -8.1 find the number​

Mathematics
2 answers:
pentagon [3]2 years ago
6 0

Answer:

-4.7

Step-by-step explanation:

-8.1 + -3.4 = -4.7

This works because - and + are inverse operations, so you can use + to help find a - problem or see if it's correct, or vise versa.

alexira [117]2 years ago
5 0

Answer:

4.7

Step-by-step explanation:

If you use the rules of the signs to eliminate the minuses and then substract 8.1 from 3.4 you get 4.7 which, if you sum it with 3.4 gives 8.1

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Let f(x)=4x-1 and g(x)=2x^2+3. Perform each function operations and then find the domain.
Triss [41]
F(x) = 4x - 1
g(x) = 2x² + 3

1. (f + g)(x) = (4x - 1) + (2x² + 3)
    (f + g)(x) = 2x² + 4x + (-1 + 3)
    (f + g)(x) = 2x² + 4x + 2
    Domain: {x| -∞ < x < ∞}, (-∞, ∞)

2. (f - g)(x) = (4x + 1) - (2x² + 3)
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    (f - g)(x) = -2x² + 4x + 1 - 3
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    Domain: {x|-∞ < x < ∞}, (-∞, ∞)
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    (g - f)(x) = 2x² + 3 - 4x + 1
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    Domain: {x| -∞ < x < ∞}, (-∞, ∞)

4. (f · g)(x) = (4x + 1)(2x² + 3)
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    (f · g)(x) = 8x³ + 12x + 2x² + 3
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    Domain: {x| -∞ < x < ∞}, (-∞, ∞)

5. (\frac{f}{g})(x) = \frac{4x - 1}{2x^{2} + 3}
    Domain: 2x² + 3 ≠ 0
                         - 3  - 3
                        2x² ≠ 0
                         2      2
                          x² ≠ 0
                           x ≠ 0
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6. (\frac{g}{f})(x) = \frac{2x^{2} + 3}{4x - 1}
    Domain: 4x - 1 ≠ 0
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                        4x ≠ 0
                         4     4
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6 0
3 years ago
A number went into this machine and 36 came out. What number went in?
labwork [276]

Answer:

6? If its a squared machine than it is 6 bc 6 squared is 36.  sorry if it is wrong.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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8-4/5f=-14-2f
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Combine like terms
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Answer:

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Step-by-step explanation:

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Answer: D

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4 0
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