Answer:a
Step-by-step explanation:
There no line ............
Well, if y is the notebook cost, well x+y=6.28, x+x+0.70=6.28, 2x=5.58, x=2.79.
The pencil box costs $2.79, while the notebook costs $3.49.
Answer:
1. acute angle, 2.right angle, 3.obtuse angle
Step-by-step explanation: