Answer:
Step-by-step explanation:
Discount = Regular price × % discount
![\text{Discount} = \text{\$179 regular price} \times \dfrac{\text{\$20 }}{\text{\$100 regular price}} = \textbf{\$35.80}\\\text{Selma will save $\large \boxed{\mathbf{\$35.80}}$}](https://tex.z-dn.net/?f=%5Ctext%7BDiscount%7D%20%3D%20%5Ctext%7B%5C%24179%20regular%20price%7D%20%5Ctimes%20%5Cdfrac%7B%5Ctext%7B%5C%2420%20%7D%7D%7B%5Ctext%7B%5C%24100%20regular%20price%7D%7D%20%3D%20%5Ctextbf%7B%5C%2435.80%7D%5C%5C%5Ctext%7BSelma%20will%20save%20%24%5Clarge%20%5Cboxed%7B%5Cmathbf%7B%5C%2435.80%7D%7D%24%7D)
The product to your question is 2a+b
The complete question in the attached figure
we have that
for c=5 and n=20------------> n*c=20*5=100
for c=2.5 and n=40------------> n*c=40*2.5=100
for c=2 and n=50------------> n*c=50*2=100
for c=1.25 and n=80------------> n*c=80*1.25=100
therefore
<span>the function that models the data is n*c=100
</span>
the answer is nc=100