Betty's Department Store is having a clearance sale. Everything in the store is off. The items Xander bought have a pre-sale total price of y dollars before sales tax. Part A: Write two equivalent expressions that represent the total cost of the items at sale price before tax in terms of y, and explain how the two expressions relate to one another. Part B: Which expression is more useful? Why?

b. x- 48 =120

step-by-step explanation:

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)

sine

step-by-step explanation:

i believe it's a.

i'm not sure on this one, most likely correct.