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shtirl [24]
3 years ago
11

20 POINTS!!!

Mathematics
1 answer:
slamgirl [31]3 years ago
3 0

Try graphing using the x-intercept and y-intercept.


-15x - 5y = 45

Put in x = 0 to get -5y = 45, making y = -9. Point (0, -9) is on the line.

Put in y = 0 to get -15x = 45, making x = -3. Point (-3, 0) is on the line.


-2x + 6y = 6

Put in x = 0 to get 6y = 6, making y = 1. Point (0, 1) is on the line.

Put in y = 0 to get -2x = 6, making x = -3. Point (-3, 0) is on the line.


(We've actually stumbled on the solution since (-3, 0) is on both lines!)


Graph the two lines using the points found above.


The solution is x = -3, y = 0.

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tangare [24]
12u + 12(15) = 756
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7 0
2 years ago
Read 2 more answers
Marcus has been running a beverage cart on weekends at the beach, selling water and soda. Last Saturday, he sold 40 bottles of w
Vedmedyk [2.9K]

Answer:

$2 for soda and $1.5 for a bottle of water

Step-by-step explanation:

You start by turning both situations into an equation

Let x represent bottles of water and y represent sodas

Saturday:

40x+25y=110

Sunday:

50x+45y=165

You then want to start by cancelling out the x in this equation, to do that you want 40x to become -50x so you:

50÷40=1.25

You then times the whole equation by -1.25

40x+25y=110

×-1.25

-50x+-31.25y= -137.5

You then add this equation by Sunday's equation

50x+45y=165

-50x+-31.25y=-137.5

          13.75y=27.5

You now want to make the co-efficient of y a whole number (for example 15) so you divide 15/13.75=1.09 recurring

13.75y=27.5

×1.09 recurring

    15y=30

15y/15=30/15

     y=2

Now that we know y = 2

We can use either Saturday or Sunday's equation to figure out the value of x

Let's use Sunday's:

50x+45×2=165

50x+90=165

50x+90-90=165-90

50x/50=75/50

x=1.5

Let's check our answer with Saturday's equation

40×1.5+25×2=110

This equation is correct

Therefore the prices for each beverage option is $1.5 for a bottle of water and $2 for a soda

4 0
3 years ago
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kogti [31]
1. The answer is already in its simplest form.
3. 3i + i is equal to 4i.
5. Combining like terms results in -5 - 9i.
7 0
3 years ago
What is 2x+4<br> dhfbwaehaskjbdjk.sabhdsahdiasebfsdafvasdgdsf
Mrac [35]

Answer: look at the picture

Step-by-step explanation: Hope this help :D

7 0
3 years ago
The local school sponsored a mini-marathon and supplied 84 gallons of water per hour for the runners. What is the amount of wate
Dmitrij [34]
All you need to do is multiply 84 by 4. 

The number of gallons by the number of quarts <em>in a gallon. </em>

80*4= 320

4*4=16

320+16= 336

There are 336 quarts of water supplied an hour. 

I hope this helps!
~kaikers
3 0
3 years ago
Read 2 more answers
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