3. After $x of discount, Emma paid $159 for her new sewing machine. Write the
expression for the original price of the sewing machine.

$(159+x)

Step-by-step explanation:

Given

Discount price = $x

Amount Emma paid after discount = $159

Original price = Amount paid + Discount

Original price= $159 + $x

Hence the required expression is $(159+x)

its not b

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)