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sashaice [31]
3 years ago
12

A number is written in scientific notation.

Mathematics
1 answer:
V125BC [204]3 years ago
8 0
If it’s 2.089 x 10^5 then the answer’s (c): 208,900
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What is the solution to the equation -2(3x-5)<34
Olegator [25]
Divide by -2: 3x-5 < -17
Add 5: 3x < -12
Divide by 3: x < -4 (answer)
7 0
3 years ago
Find xif 4; 4+2×;4+4× are in Geometric sequences​
Ray Of Light [21]

Given:

4,4+2x,4+4x are in geometric sequences​.

To find:

The value of x.

Solution:

If a, b, c are in geometric sequences​, then

\dfrac{b}{a}=\dfrac{c}{b}

b^2=ac           ...(i)

It is given that 4,4+2x,4+4x are in geometric sequences​. By using (i), we get

(4+2x)^2=(4)(4+4x)

4^2+2(4)(2x)+(2x)^2=(4)(4)+4(4x)

16+16x+4x^2=16+16x

4x^2=16+16x-16-16x

On further simplification, we get

4x^2=0

x^2=0

x=0

Therefore, the value of x is 0.

7 0
3 years ago
Find all complex numbers $z$ such that $z^4 = -4.$
patriot [66]

Converting -4 to polar form gives -4=4\exp(i\pi).

Then the 4th roots of -4 would be the numbers

4^{1/4}\exp\left(i\dfrac{\pi+2k\pi}4\right)

where <em>k</em> is taken from {0, 1, 2, 3}.

So we have

z_1=4^{1/4}\exp\left(\dfrac{i\pi}4\right)=\sqrt2\left(\cos\dfrac\pi4+i\sin\dfrac\pi4\right)=1+i

z_2=\sqrt2\left(\cos\dfrac{3\pi}4+i\sin\dfrac{3\pi}4\right)=-1+i

z_3=\sqrt2\left(\cos\dfrac{5\pi}4+i\sin\dfrac{5\pi}4\right)=-1-i

z_4=\sqrt2\left(\cos\dfrac{7\pi}4+i\sin\dfrac{7\pi}4\right)=1-i

4 0
4 years ago
What is the length of a picture frame whose width is 3 inches and whose proportions are the same as as a 9-inch wide by 15-inch
mezya [45]
The answer is 5

Explanation:

The 9 by 15 picture is similar to the 3 by x picture, meaning its the same shape but not the same size.

Since we know what the width is for the first picture we have to get the width of the second picture to equal the same width without changing the shape.

To do that you divide BOTH 9 and 15 by 3

And you get 3 and 5.

Hope this help you understand better.
4 0
3 years ago
What is your hfavorite distance between Points A and B?
Oksi-84 [34.3K]
D. square root of 58
6 0
3 years ago
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