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)
1) x= -7
2) x= -5
3) x=-22
4) x =8
Not sure about the last one tho
I tried to help :)
The midpoint formula is x1+x2 over 2 and y1+y2 over 2. When you use it to find the midpoint of (0,-8) and (-4,10), you get (-2,1).
Slope formula is y2-y1 over x2-x1, which will give you -6.