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prohojiy [21]
3 years ago
7

PLEASE HELP I NEED THIS ASAP

Mathematics
1 answer:
vivado [14]3 years ago
8 0

Answer:

you should've paid attention in class :/

Step-by-step explanation:

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how does the area of a circle change if the if the radius is multiplied by factor of n where n is a whole number?
Alex777 [14]
Radius is half that of the diameter and area =pi times radius squared then the area wouldn't be decimal format if it was while number I have no idea without looking at my notes... Coffee here I come
6 0
4 years ago
-3|9x-7|=2 Find the answer for x
labwork [276]
<h2>Solving Equations with Absolute Expressions</h2><h3>Answer:</h3>

<u>No Solutions</u>

<h3>Step-by-step explanation:</h3>

Given:

-3|9x -7| = 2

Rewriting the given equation:

-3|9x -7| = 2 \\ |9x -7| = -\frac{2}{3}

We have to realize that the right side of the equation, |9x -7|, will always be positive no matter what real values of x (because we're taking the absolute value of the expression) and we are equating it to a <em>negative</em> constant number, -\frac{2}{3}\\. Something that is always positive will never be negative so there's no value for x that satisfies the solution.

\rule{6.5cm}{0.5pt}

<em>You</em><em> </em><em>may</em><em> </em><em>not</em><em> </em><em>read</em><em> </em><em>the</em><em> </em><em>following</em><em> passage</em><em> </em><em>that</em><em> </em><em>I</em><em> </em><em>have</em><em> </em><em>written.</em>

\rule{6.5cm}{0.5pt}

Solving by positive of the expression:

9x -7 = -\frac{2}{3} \\ 9x = -\frac{2}{3} +7 \\ 9x = -\frac{2}{3} +\frac{21}{3} \\ 9x = \frac{19}{3} \\ 9x \times \frac{1}{9} = \frac{19}{3} \times \frac{1}{9} \\ x = \frac{19}{27}

Solving by the negative of the expression:

-(9x -7)= -\frac{2}{3} \\ 9x -7 = \frac{2}{3} \\  9x = \frac{2}{3} +7 \\ 9x = \frac{2}{3} +\frac{21}{3} \\ 9x = \frac{23}{3} \\ 9x \times \frac{1}{9} = \frac{23}{3} \times \frac{1}{9} \\ x = \frac{23}{27}

Checking: x = \frac{19}{27}\\

-3|9(\frac{19}{27}) -7| \stackrel{?}{=} 2 \\ -3|\frac{19}{3} -7| \stackrel{?}{=} 2 \\ -3|\frac{19}{3} -\frac{21}{3}| \stackrel{?}{=} 2 \\ -3|-\frac{2}{3}| \stackrel{?}{=} \\ -3(\frac{2}{3}) \stackrel{?}{=} 2 \\ -2 \stackrel{?}{=} 2 \\ -2 \neq 2

x = \frac{19}{27}\\ is an extraneous solution.

Checking: x = \frac{23}{27}\\

-3|9(\frac{23}{27}) -7| \stackrel{?}{=} 2 \\ -3|\frac{23}{3} -7| \stackrel{?}{=} 2 \\ -3|\frac{23}{3} -\frac{21}{3}| \stackrel{?}{=} 2 \\ -3|\frac{2}{3}| \stackrel{?}{=} \\ -3(\frac{2}{3}) \stackrel{?}{=} 2 \\ -2 \stackrel{?}{=} 2 \\ -2 \neq 2

x = \frac{23}{27}\\ is an extraneous solution.

8 0
3 years ago
Factor the polynomial function over the complex numbers.
Bumek [7]

Answer:

[x - 1][x + 1][{x}^{2} + 4]

Step-by-step explanation:

Knowing that you have to find two numbers that when they differ to 3, they also multiply to −4, and those numbers are −1 and 4. So, after clearing that up, you will have this [since our degree of this polynomial function is 4]:

[{x}^{2} - 1][{x}^{2} + 4]

Then, since {x}^{2} - 1 is factorable, you will get this:

[x - 1][x + 1]

Finally, attach [{x}^{2} + 4] to the partially factored polynomial to get this:

[x - 1][x + 1][{x}^{2} + 4]

I am joyous to assist you anytime.

4 0
4 years ago
which measurement would be lest likely to be written in scientific notation: the thickness of a dog, the radius of a period on t
Dafna11 [192]
The radius of a period on this page

This is because people usually write numbers that are very big/small as a scientific notation. (The radius of a period on this page is small)
6 0
4 years ago
There are 104 coins in a bottle.
fredd [130]

Answer:

its easy solve it with calculator

Step-by-step explanation:

8 0
3 years ago
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