3 years ago

What is the solution to the system of equations x-y=5 and 3x+7y=-5

Mathematics

1 answer:

True [87]3 years ago

6 0

Answer:

Step-by-step explanation:

3(x-y)-3x-7y=3(5)-(-5)

3x-3y-3x-7y=15+5

-10y=20

y=-2, since x-y=5

x-(-2)=5

x+2=5

x=3

So the solution is the point (3,-2)

You might be interested in

If i earn $8.10 and hour and worked 6 hours a day how many days would i need to work to get 470 hours.

prisoha [69]

Since 470/6 = 78.333 it would take you 78.333 days to work 470 hours.

4 0

3 years ago

I WILL GIVE A CROWN JUST NEED HELP ASAP

pav-90 [236]

Answer:

$720

Step-by-step explanation:

First tutor = 30 x 10 = $300

Second tutor = 30 x 14 = $420

Total = 420 + 300 = $720

3 0

3 years ago

What is the volume of the composite figure show in the picture? Please explain how you found the answer if you can. Please help

Crazy boy [7]

We did this this year and by what I can remember I belive it is 4,320 inches. I hope this helps and I hope I got it right so u don't get it wrong.

5 0

3 years ago

iVinArrow [24]

Answe3.141592654

Step-by-step explanation:

By mupltjirini

7 0

3 years ago

Does anyone know how to do this <br><br>csc x ( sin x + cos x) = 1 + cot x

Dima020 [189]

9514 1404 393

Explanation:

Use the identities ...

csc(x) = 1/sin(x)

cot(x) = cos(x)/sin(x)

$\csc(x)(\sin(x)+\cos(x))=1+\cot(x)\\\\\dfrac{1}{\sin(x)}(\sin(x)+\cos(x))=1+\cot(x)\\\\\dfrac{\sin(x)}{\sin(x)}+\dfrac{\cos(x)}{\sin(x)}=1+\cot(x)\\\\1+\cot(x)=1+\cot(x)$

8 0

3 years ago

What is the solution to the system of equations x-y=5 and 3x+7y=-5​

What is the solution to the system of equations x-y=5 and 3x+7y=-5