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Neko [114]
3 years ago
15

PLEASE HELP ME EXPLAIN THE ANSWER

Mathematics
1 answer:
tigry1 [53]3 years ago
8 0

Answer:

  See the attachment

Step-by-step explanation:

The inequalities resolve to ...

  x ≥ 1 or x ≤ -3

You have chosen the correct placement of the lines on the number line. The "or equal to" symbol (≥ or ≤) means the dots at -3 and +1 are filled in, indicating those numbers are part of the solution.

If the ">" or "<" symbol is used in the inequality, the dot is left open, as in the answer you selected. The open dot indicates that value is not part of the solution set.

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Scrat [10]
The answer is D because you can multiply the second equation by -4
6 0
3 years ago
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Convert -3pi/10 to degrees
ipn [44]

we know there are 180° in π radians, how many degrees then in -3π/10 radians?

\bf \begin{array}{ccll} degrees&radians\\ \cline{1-2} 180&\pi \\\\ x&-\frac{3\pi }{10} \end{array}\implies \cfrac{180}{x}=\cfrac{\pi }{~~-\frac{3\pi }{10}~~}\implies \cfrac{180}{x}=\cfrac{\frac{\pi}{1} }{~~-\frac{3\pi }{10}~~} \\\\\\ \cfrac{180}{x}=\cfrac{\pi }{1}\cdot \cfrac{10}{-3\pi }\implies \cfrac{180}{x}=-\cfrac{10}{3}\implies 540=-10x\implies \cfrac{540}{-10}=x \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill -54=x~\hfill

5 0
3 years ago
The amount Lin's sister earns at her part-time job is proportional to the number
gulaghasi [49]

Answer:

y = 9.6x

Yes, y is a function of x.

x =  \frac{5}{48} y

Step-by-step explanation:

For a proportional relation, the equation is given by:

y = kx

where k is the unit rate of change.

We were told that, Lin's sister earns $9.6 per hour.

This means k=9.6.

We substitute to get:

y = 9.6x

We could rewrite this as

y(x) = 9.6x

Yes, y is a function of x.

To obtain an equation describing x as a function of y, we solve for x to get:

x =  \frac{1}{9.6} y

6 0
3 years ago
What is 2.7(7.8) Please show work I don't understand this question thank you!
kumpel [21]

multiplication? then...

2.7 * (7.8) = 21.06

7 0
3 years ago
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How do you do this problem 2n^3-n^2-136n=0
Rzqust [24]
<span>2n^3-n^2-136   :Equation: 

                                      Substitute 0 for n  

</span>                                      Simplify {20}^{3}<span> to </span><span>8000 
</span>
<span>8000−<span>0<span><span>​^2</span><span>​​</span></span></span>−136 

</span>                                     Simplify <span>{0}^{2}<span>​​</span></span><span> to </span><span>0 
</span><span><span>8000−0−136 

= 7864</span></span><span>
</span>
5 0
3 years ago
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