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Delvig [45]
3 years ago
14

Please answer this question​

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
5 0

Answer:

3

Step-by-step explanation:

log(3x^{3}) - log(x^{2}) = log(\frac{3x^{3}}{x^{2}})\\log(27) - log(x) = log(\frac{27}{x} )\\

therefore,

\frac{3x^{3} }{x^{2} } = \frac{27}{x} \\3x=\frac{27}{x} \\3x^{2} =27\\x= +3\\x=-3

however, since logarithms cannot have negative arguments, x can only be +3

i.e. log(-3) is impossible, and will return MATH ERROR on a calculator.

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What is f(x)= -2+7 where x= -5?
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Answer:

17

Step-by-step explanation:

f(x)= -2x+7

f(-5)= -2(-5)+7

              10+7

         f(-5)=17

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earnstyle [38]

Answer:

any coordinate outside the parabola is a reasonable answer.

Step-by-step explanation:

test the solution (0, 0) and if if that number is greater than 0 then the rest of the points outside on the inside are.

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-3 is less than 0 so (0, 0) is not a possibility so any coordinate outside the parabola is a reasonable answer.

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3 years ago
8. How long will it take Seb to run 4000 m at an average speed of 5 m/s?
meriva

Answer:

Seb will take 13 minutes and 20 seconds  to run 4000 m at an average speed of 5 m/s

Step-by-step explanation:

time taken = distance / speed

time taken = 4000/5

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Find the sum of (x + 5),(-4x - 2) and (2x - 1)
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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
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<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

(x + 5) + (-4x - 2) + (2x - 1)

<u>Step 2: Simplify</u>

  1. Combine like terms (x):                     -x + 5 - 2 - 1
  2. Combine like terms (Z):                     -x + 2
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