8/6+(-9/5)=? But in the simplest form Also I’m have trouble understanding how to add and subtract fraction could you give me it a simplest way

8/6+(-9/5)= 8/6-9/5= -7/15

Step-by-step explanation:

8/6= 40/30

-9/5=54/30

40/30 - 54/30= -14/30

-14/30= -7/15

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

sgth thdhtxr ythdsx hfgh ysrth th srtrh

step-by-step explanation:

trshd h rdhsjsdrnytjdt jyjyukfddythj