Can anyone tell me if the ordered pair (x,y) = (5.8,2.0) is a solution to the equation y = 4x - 21.2
I would appreciate it if someone show me the best way to make this determination.
Hi there.
The first value of the ordered pair is the x value, and the second is the y value. So to complete the ordered pairs in those questions you just need to replace the x in the equation with the value you are given, then solve this to find the y value.
For the first one:
$\displaystyle y=\frac{4}{5}x+3$
so
$\displaystyle y=\frac{4}{5}\left ( 5 \right ) +3$
$\displaystyle y=4+3$
$\displaystyle y=7$
So the ordered pair would be $\displaystyle \left ( 5, \ 7\right )$
Are you able to do the other ones now?