Prep 3 Alg U1

 $The\ \ number\ of\ solution\ of\ the\ 2\ equations\ \ \ x+y=1\ ,\ y+x=2\ is\ .........$  

• 0
  

• 1

• 2

• Infinite

If x-2=0 , y+2x=0 , the the s.s of these 2 equation is ......

• {(-2,4)}

• {(2,4)}

• {(2,-4)}

• (2,-4)

If there is an infinite number of solutions of the 2 equations 2x+3y=5 , ax+6y=10 , the a= .........

• 4

• -4

• 2

• -2

 $aX^2+bX+c=0\ ,\ if\ b^2-4ac>0\ ,\ the\ the\ equation\ has\ ......\ of\ roots.$  In the equation : a

• 1

• 2

• 0

• Infinite

 $The\ s.s\ of\ the\ 2\ equations\ x=\frac{1}{y}\ and\ x=3\ is\ .......$  

• {(3,3)}

•  $\left\{\left(\frac{1}{3},3\right)\right\}$  

•  $\left\{\left(3,\frac{1}{3}\right)\right\}$  

• Non above

 $The\ s.s\ of\ the\ equation\ of\ the\ Curve\ of\ a\ quadratic\ equation\ which\ passes\ through\ the\ point\ \left(-3\ ,\ 0\right)\ is\ ..............$  

• {(3,0)}

• {-3}

• {3,0}

•  $\phi$  

 $The\ s.s\ of\ the\ 2\ equations\ :\ x+y=2\ ,\ \frac{1}{x}+\frac{1}{y}=2\ is\ ..........\$  

• {(1,1)}

• {1}

• {(-1,3)}

•  $\phi$  

 $Find\ the\ s.s\ of\ the\ 2\ equations\ :\ x+y=0\ ,\ \frac{-4}{y}=x$  

• {(2,2)}

• {(-2,-2)}

• {(2,-2)}

• {2,-2}

By using general formula find the s.s of  $x+\frac{4}{x}=6$   rounding the result to the nearest one decimal.

• {(5.2 , 0.8)}

• {5.2 , 0.8} 

• {5.2}

• {0.8}

Find the s.s of the 2 equations x+2y=4 , y-2x=-3 , graphically

• {(-2,1)}

• {(2,1)}

•  $\phi$  

• {2,1}