Ask question

Ask question

All categories

3 years ago

13

Write and solve a revised system -5x-2y=6 3x+6y=6

1 answer:

swat323 years ago

7 0

$\left \{ {{-5x-2y=6\ \ | *3} \atop {3x+6y=6}} \right. \\\\ \left \{ {{-15x-6y=18} \atop {3x+6y=6}} \right. \\+----\\addition\\\\
-12x=24 \ \ \ \ | divide\ by\ -12\\\\
x=-2\\\\
2y=-5x-6\ \ \ | divide\ by\ 2\\\\
y=\frac{-5x-6}{2}\\\\
y=\frac{-5*(-2)-6}{2}=\frac{4}{2}=2$

You might be interested in

In the xy-plane, the point (4,4) lies on the graph of the function f(x)-2x2-bx + 12. What is the value of b?

nikdorinn [45]

Simply substitute the point into the given equation; as there is one variable, you only need one point and so one is given. When done so, you shall get b=4

5 0

3 years ago

Solve 3y^{2} - (y + 2) (y - 2)

hram777 [196]

Answer:

3y^2 - (y + 2) (y - 2) = 0

<=> 3y^2 - (y^2 - 4) = 0

<=> 2y^2 + 4 =0

<=>y^2 + 2 = 0

=> Because y^2 is always equal or larger than 0, there is no real solution.

Hope this helps!

:)

8 0

4 years ago

Read 2 more answers

What is the surface area?<br><br> 2 mm<br> 2 mm<br> 2 mm<br><br> square millimeters

Alona [7]

Answer:

24 mm^2

Step-by-step explanation:

length x width x 6 sides in a cube

(2)(2)(6)=24

4 0

3 years ago

What is the equation of this graph? Will give brainliest!

Scilla [17]

...........................

6 0

3 years ago

Read 2 more answers

PLSSSSSS HELPPPP......Which equation can be used to find the unknown length, b, in this triangle?

castortr0y [4]

Its A. the side lengths squared equal the hypotenuse squared.

6 0

3 years ago

Read 2 more answers