$\left\{\begin{array}{ccc}x-3y=6&\text{multiply both sides by (-2)}\\2x+2y=4\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-2x+6y=-12\\2x+2y=4\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad8y=-8\qquad\text{divide both sides by 8}\\.\qquad\qquad y=-1\\\\\text{Put the value of y to the first equation:}\\\\x-3(-1)=6\\x+3=6\qquad\text{subtract 3 from both sides}\\x=3$

5 0

3 years ago

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Use a ratio to compare this quantity 3 kg ; 200g

Nana76 [90]

9514 1404 393

Answer:

15 : 1

Step-by-step explanation:

Each kg is 1000 g, so the ratio is ...

3000 g : 200 g = 30 : 2 = 15 : 1

3 kg is 15 times 200 g.

6 0

3 years ago

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B4.1a) The diagram shows a triangle.

Yuki888 [10]

So angles on a straight line add up to 180°
And angles in a triangle adds up to 180° try if you can work it out now
If you still don’t understand let me know

3 0

3 years ago

What is .133 repeating as a fraction?

mihalych1998 [28]

.13333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333

6 0

3 years ago

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