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3 years ago

Why is it impossible to determine whether the equation 5x+10=25 is true / false ? Explain

Mathematics

2 answers:

Assoli18 [71]3 years ago

8 0

You need to know the value of X to determine whether or not the equation is true.

eduard3 years ago

6 0

Answer: False

Step-by-step explanation:

Because...

You still get a proper answer. So if you solve it you don't get a crazy answer. And since I did solve it you do get x = 3. So the answer is false.

* Hopefully this helps:) Mark me the brainliest:)!!

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Equation of elimination method<br> 4a+b=28<br> a+4b=-8

Vilka [71]

Download an app called Photomath then it will answer it for you with work and explaining

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3 years ago

Find the value of x which satisfies the following equation.<br> log2(x−1)+log2(x+5)=4

weqwewe [10]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \: x = 3$

____________________________________

$\large \tt Solution \: :$

$\qquad \tt \rightarrow \: log_{2}(x - 1) log_{2}(x + 5) = 4$

$\qquad \tt \rightarrow \: log_{2} \{(x - 1)(x + 5) \} = 4$

[ log (x) + log (y) = log (xy) ]

$\qquad \tt \rightarrow \: ( x - 1)(x + 5) = {2}^{4}$

$\qquad \tt \rightarrow \: {x}^{2} + 5x - x - 5 = 16$

$\qquad \tt \rightarrow \: {x}^{2} + 4x - 5 - 16 = 0$

$\qquad \tt \rightarrow \: {x}^{2} + 4x -21 = 0$

$\qquad \tt \rightarrow \: {x}^{2} + 7x - 3x - 21 = 0$

$\qquad \tt \rightarrow \: x(x + 7) - 3(x + 7) = 0$

$\qquad \tt \rightarrow \: (x + 7)(x - 3) = 0$

$\qquad \tt \rightarrow \: x = - 7 \: \: or \: \: x = 3$

The only possible value of x is 3, since we can't operate logarithm with a negative integer in it.

$\qquad \tt \rightarrow \: x = 3$

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

4 0

2 years ago

What is the percent of change from 14 inches 26 inches

PolarNik [594]

To find the percent of anything, you divide what you have from the total (or the smaller number over the bigger number). In this case, you will do 14/26.
14/26=0.53846
I'm going to round to the hundredths: 0.54
Move the decimal place two times to the right: 54
The percent change from 14 inches to 26 inches is 54%

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3 years ago

Volume of a cube size 7cm

JulijaS [17]

Answer:

343 cm3

Step-by-step explanation:

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3 years ago

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In this picture what is the value of x

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