20 000 is as much as 20 * 1 000, so we can write it as: 20 * 10^3
3 400 000 is as much as 34 * 100 000, so we can write it as: 34 * 10^5
The sum in scientific notation would look like this:
20 * 10^3 + 34 * 10^5
I hope that's what you meant :)
Ok but allow my humble self to use
instead of
.
We have,

If you wanna know what the inverse is swap the values of x and y,

And now solve for y,
.
Hope this helps.
The answer is (-7.5, -7.5)
3x*5x-2=4-2x*1
15x-2=4-2x
13x=2
x=6.5