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Novosadov [1.4K]
3 years ago
13

8.-2(x + 1) = -2x + 5​

Mathematics
2 answers:
denis-greek [22]3 years ago
6 0
-2 (x+1) = -2x +5
-2x+-2 = -2x+5
+2 +2
-2x=-2x+7
+2x +2x
0=7
At this point, you can see that the solution is unsolvable. Obviously, zero does not equal seven. There are zero solutions to the equation
Luden [163]3 years ago
3 0

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

mutiply the bracket by -2

(-2)(x)= -2x

(-2)(1)= -2

-2x-2= -2x+5

move -2x to the left side

sign changes from -2x to 2x

-2x+2x-2= -2x+2x+5

0-2= 0-5

-2= -5

Answer:

no solution

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3 years ago
Please find the square roots of the following complex number.
Nana76 [90]

Hey there,

First, find the square root of the given equation.

\sqrt{z}=\sqrt{81(\text{cos}(\frac{4\pi}{9})+i\text{sin}(\frac{4\pi}{9})}\\=9\text{cos}\frac{1}{2}(2k\pi+(\frac{4\pi}{9}))+i\text{sin}\frac{1}{2} (2k\pi+(\frac{4\pi}{9}))

Keep in mind that this is solved for k = 0 and 1.

Second, simplify.

=9\text{cos}(\frac{2\pi}{9})+i\text{sin}(\frac{2\pi}{9})~\text{or}~9\text{cos}(\frac{11\pi}{9})+i\text{sin}(\frac{11\pi}{9})

Best of Luck!

6 0
3 years ago
Could someone answer and explain these please? Thank you!
Oksana_A [137]

Answer 1:

It is given that the positive 2 digit number is 'x' with tens digit 't' and units digit 'u'.

So the two digit number x is expressed as,

x=(10 \times t)+(1 \times u)

x=10t+u

The two digit number 'y' is obtained by reversing the digits of x.

So, y=(10 \times u)+(1 \times t)

y=10u+t

Now, the value of x-y is expressed as:

x-y=(10t+u)-(10u+t)

x-y=10t+u-10u-t

x-y=9t-9u

x-y=9(t-u)

So, 9(t-u) is equivalent to (x-y).

Answer 2:

It is given that the sum of infinite geometric series with first term 'a' and common ratio r<1 = \frac{a}{1-r}

Since, the sum of the given infinite geometric series = 200

Therefore,\frac{a}{1-r}=200

Since, r=0.15 (given)

\frac{a}{1-0.15}=200

\frac{a}{0.85}=200

a=0.85 \times 200

a=170

The nth term of geometric series is given by ar^{n-1}.

So, second term of the series = ar^{2-1} = ar

Second term = 170 \times 0.15

= 25.5

So, the second term of the geometric series is 25.5






Step-by-step explanation:


8 0
3 years ago
It was 96 kilometers from perry to medford. David raced to medford and idled back. If the round trip took 8 hours, what was his
valkas [14]
Average speed = (total distance) / (total time)

Average speed = (192 km) / (8 hours) = 24 km per hour .
3 0
3 years ago
Read 2 more answers
The probability that any postcard posted in Portugal on Monday is delivered to the UK within a week is 0.62.
sashaice [31]

Answer:

You can expect at least 9 of her postcards to arrive within a week

To find that, we multiply the number of postcards by the probability

15 x 0.62 = 9.3

Hope this helps

Good Luck

5 0
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