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vampirchik [111]
3 years ago
6

Can someone please help me with this?

Mathematics
1 answer:
Rzqust [24]3 years ago
8 0
Which question do you need help with ?

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Maslowich

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3$

Step-by-step explanation:

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Consider a tank with a capacity of 1000 ` and initially contains 400 ` of solution
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Not sure but it's A

Step-by-step explanation:

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Solve the simultaneous equations<br> 2x+3y=-3<br> 3x-2y=28
icang [17]
\left \{ {\big{ 2x+3y=-3\ /\cdot2} \atop\big {3x-2y=28\ /\cdot3 }} \right.\\\\  \left \{ {\big{ 4x+6y=-6} \atop\big {9x-6y=84 }} \right.\\---------\\4x+9x=-6+84\\\\13x=78\ /:13\\\\x=6\\\\2x+3y=-3\ \ \ \ \Rightarrow\ \ \ 2\cdot6+3y=-3\ \ \ \Rightarrow\ \ \ 3y=-3-12\\\\3y=-15\ /:3\\\\c=-5\\\\Ans.\  \left \{ {{x=6} \atop {y=-5}} \right.
4 0
3 years ago
For your rock collection display, you want to have at most 25 samples.
mezya [45]

Answer:

\left \{ {y\leq 25-x} \atop {y\geq 3x}} \right.

The graph is attached.

Step-by-step explanation:

Let be "x" the number of metamorphic samples and "y" the number of sedimentary samples.

You know that you want to  to have at most 25 samples, then:

y\leq 25-x

And you want to have at least 3 times as many sedimentary samples as

metamorphic samples, then:

y\geq 3x

Therefore, the system of  inequalities that model the situation is:

\left \{ {y\leq 25-x} \atop {y\geq 3x}} \right.

The y-intercept of the line y=25-x is:

y=25-(0)\\\\y=25

And the x-intercept is:

0= 25-x\\\\x=25

Knowing this, you can graph the line

The y-intercept of the line y= 3x is:

y=3(0)\\\\y=0

And the x-intercept is:

0= 3x\\\\x=0

Knowing this, you can graph the line.

Observe the graph attached, where the solution of the system of inequalities is the intersection of the regions.

6 0
3 years ago
Who can get the answer help me out
Alecsey [184]
I'd say it's D. I know the effect is that the money is increased, however I don't know by exactly how much.
8 0
4 years ago
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