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never [62]
3 years ago
11

What's the equation of the line shown above?

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
5 0
Your answer is D here.
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Best answer gets the brainliest!<br> Find $a/b$ when $2\log{(a -2b)} = \log{a} + \log{b}$.
andrey2020 [161]

By some properties of logarithms, rewrite the equation as

2\log(a-2b) = \log(a) + \log(b) \\\\ \log(a-2b)^2 = \log(ab)

so that

(<em>a</em> - 2<em>b</em>)² = <em>ab</em>

Expand the left side:

<em>a</em> ² - 4<em>ab</em> + 4<em>b</em> ² = <em>ab</em>

Rearrange terms to get a quadratic equation in <em>a</em>/<em>b</em> :

<em>a</em> ² - 5<em>ab</em> + 4<em>b</em> ² = 0

<em>b</em> must be greater than 0, otherwise log(<em>b</em>) doesn't exist, and the same goes for <em>a</em>. So we can divide by <em>b</em> ² to get

<em>a</em> ²/<em>b</em> ² - 5<em>a</em>/<em>b</em> + 4 = 0

Factorize and solve for <em>a</em>/<em>b</em> :

(<em>a</em>/<em>b</em> - 4) (<em>a</em>/<em>b</em> - 1) = 0

==>   <em>a</em>/<em>b</em> = 4   or   <em>a</em>/<em>b</em> = 1

However, if <em>a</em>/<em>b</em> = 1, then <em>a</em> = <em>b</em> makes <em>a</em> - 2<em>b</em> = -<em>b</em>. But we must have <em>b</em> > 0, so we omit the second solution and end up with

<em>a</em>/<em>b</em> = 4

5 0
3 years ago
Can someone help me please ? It would be greatly appreciated:-)
WITCHER [35]
I think it might be a ? it sounds the most reasonable .
7 0
3 years ago
I kind of don’t get this could someone explain and answer this question I would really appreciate :)
amm1812

Answer:

its the fourth one

sts3ps oe

3 0
3 years ago
Read 2 more answers
I need to know the area in the rectangle pictured above please!
bija089 [108]

Answer:

180 ft^2

Step-by-step explanation:

Area of the rectangle is calculated by multplying : height*widht*lenght

15*6*2 = 180 ft^2

6 0
3 years ago
Simplify this expression.
Nat2105 [25]

Answer:

B. -13w - 7

Step-by-step explanation:

Combine -6w and -7w together to get -13w as the first part of your answer since you are subtracting from a negative to get a negative answer and combine -8 and 1 together to get -7 since you are adding 1 from -8 to go up.

8 0
3 years ago
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