xud33

To cancel $ab$ you can add the equations together:

 $2a=10 \Rightarrow a=\color{blue}{\boxed{5}}$ 

Now plug in $a$ into one of the equations to get:

$5+5b=250 \Rightarrow 5b=245 \ \text{so} \ b=\color{blue}{\boxed{49}}$.

I hope that helped! 

The only solution works out to be  $x=2$.

Put the terms with $x$ on one side and the numbers on the other:

$2x+x+7x \le 12+18+5$

which simplifies to $10x\le35$ 

So $x= \dfrac{7}{2}$. 

I hope that helped!

First, simplify the function to: $x=2y^2-13y-1$

Setting $x'=0$, $4y-13=0$ so $y=\dfrac{13}{4}$. Your next step is to find $x$. Then $(x,y)$ is the vertex.

Good answer.

Hi guest,

Good answer.

Anyways,      $\boxed{n=3}$

$x=120$                                            $240000=2000x$                   $\dfrac{2000}{60}=\dfrac{6000}{x}$

Thanks, I bumped into the same promblem and this helped alot.