They are all eawualateral
Answer:
Step-by-step explanation:
1.
(-2,0) (0,-7) y2-y1
-----------------
x2-x1
-7-0= -7
0- (-2)= 2 ------>>> -7/2 =m or slope
2.
y= -7/2x+b to find b u plug in one pair of coordinates for example (-2,0)
and use inverse properties to find b
0 = -7/2(-2) + b
14/2 = 7
0= 7+b
-7 -7
-----------
-7=b
3.
y=-7/2x-7
Answer:
Sales tax=31.16, total price=359.16
Step-by-step explanation:
Price x sales tax rate -=sales tax
328 x .095(9.5%)=31.16 sales tax
price + sales tax = total price
328 + 31.16=359.16