1) last three cba to do the rest soz
Y=Mx+b (m is slope, b is y-intercept)
Answer:

Step-by-step explanation:
It's like solving any equation, except we have letters instead of numbers .
k = 3tm + rs {subtract rs from both sides}
k - rs = 3tm {divide both sides by (3m)}
{swap sides}
m≠0
{m must be ≠0 because you cannot divide by 0. There is no t for m=0}
Scientific notation means the numbers have to be between 1 and 10, so here is the answer as well as where to move the decimal
2+2=4 x 20=80 I hope this is what you were looking for