Which of the following does NOT show an identity property? 2 + 1 = 3

5 ÷ 1 = 5

3 − 0 = 3

4 × 1 = 4

2+1 = 3

Step-by-step explanation:

The first one

2+1 = 3

the identity properties are :

n+0=n

n-0=n

n/1=n

n*1=n

and the one that does NOT show an identity is 2+1=3

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

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)