Multiply the first equation by -2. It turns into 4x+18y=50 and the other one stays -4x-9y=-23. Then you "eliminate" the equations by "adding" them. Set it up like this:
4x+18y=50
+
-4x-9y=-23
4x-4x= 0. 18y-9y= 9y and 50-23= 27
SO: 9y= 27 and y= 3
And then you plug that in to one equation: 4x +18(3)= 50. 4x= 50-(18*3)
4x= -4, so x=-1.
Plug it back in to check!
Hope this helps. Happy solving! :)
40 because 15×4 is 60 and there is 60 minutes in an hour
<span>the discriminant formula is D = b^2 - 4ac
(idk how to put graphs or anything but yeh)
</span>
Answer:
The answer would be (6, -6)
I hope that helped! :)
Answer:
60
Step-by-step explanation:
60 plus 60 plus 60 is 180
has to add up to 180
