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lyudmila [28]
2 years ago
5

Log3(2x-1)=3 help me out:(

Mathematics
1 answer:
aleksley [76]2 years ago
5 0

Answer:

x = 2.

Step-by-step explanation:

(Brainliest?)

So log3(2x-1)+log3(x+7)=3 = log3(3^3) So (2x- 1)(x+7) = 27..... 2x^2+13x - 34 =0 (2x+17)(x - 2) = 0 ..so x = 2 or - 17/2. The solution x = - 17/2 is rejected since we cannot have log 3(2*- 17/2 - 1),a negative number. So the answer is x = 2.

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Law Incorporation [45]

Answer:

5 m

Step-by-step explanation:

Use the volume formula, V = lwh

Plug in the volume, width, and height, then solve for l (the length)

V = lwh

70 = (l)(2)(7)

70 = 14l

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3 years ago
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A fulcrum moving a resistance of 200 g has a distance to the fulcrum of 20 cm, the effort mass of 50 g has a distance to the ful
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Answer:

The ideal mechanical advantage (IMA) is 4.

Step-by-step explanation:

The ideal mechanical advantage is the ratio of length of longer lever L_e to that of shorter lever L_r

IMA \frac{L_e}{L_r}

Please refer to the image attached.

We could see that the the resistance load moves 10\ cm cm towards the fulcrum so the distance of resistance load from fulcrum = (20-10) =10\ cm

Now the as the effort force moves 40\ cm towards the fulcrum overall distance from the fulcrum to the effort force (load) =(80-40)=40\ cm

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3 years ago
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katrin2010 [14]

Answer:

C. Four less than the product of two and a number is less than the product of four and the same number increased by eight.

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Converting expressions to word form

Step-by-step explanation:

<u>Step 1: Define</u>

2x - 4 < 4x + 8

<u>Step 2: Translate</u>

"2x" is the product of two and a number <em>x</em>

" - 4" is four less

"<" is less than

"4x" is the product of four and a number <em>x</em>

" + 8" is increased by 8

<u>Step 3: Combine</u>

The difference between the product of two and a number <em>x</em> and 4 is less than the sum of the product of four and a number <em>x</em> and 8.

<u>Step 4: Reword</u>

Four less than the product of two and a number is less than the product of four and the same number increased by eight.

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Which expression is equivalent to 18/14 × 4​
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Step-by-step explanation:

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