Complete the solution of the equation. find the value of y when x equals 1.

9x +7y= -12

Step-by-step explanation:

Given Equation:  

                                        y=?       at    x= 1

Putting the given value of 'x' in the equation:

At , the value of y is

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)