What is the problem I can help but there is none.
40 is 20% of 160, so if she saved 40$ and it was 20% off then the original price was 160$!!!
A b is no slope and kL is undefined
The ratio of the areas of the two polygons can be 25:45
Just Multiply the two give numbers by 5 and you get the answer.
F(19)= (3/(19+2)) - sqrt(19-3)
= (3/21) - sqrt(16)
= (1/7) - 4
= (1/7) - (28/7)
= -27/7
= - 3 6/7
