I would compute sqrt(1 + 160pi^2) first to get approximately 39.75093337
Add this to 1 and we have 40.75093337
Then divide over 2pi to get a final approximate result of 6.48571248
So x = 6.48571248 is one approximate solution
In short, I computed
only focusing on the plus for now.
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If you were to compute
you should get roughly -6.167402596 as your other solution. Each solution can then be plugged into the original equation to check if you get 0 or not. You likely won't land exactly on 0 but you'll get close enough.
Slope is 0, b=3
The equation is y=0x+3, or y=3
This is a relatively easy question to solve. You want to find 19.3% OF 126, meaning that you have to use multiplication. So you would do 126*0.193 which would equal 24.318 which can be rounded to 24.3