It's called an obtuse angle.
She spent 10 minutes. 25% x 40 = 10.
Answer:

Step-by-step explanation:
We have two conditions:

Bella: y = 25x + 60 = 25(10) + 60 = 250 + 60 = 310
Heather: y = 30x + 10 = 30(10) + 10 = 300 + 10 = 310
Answer:
-50y+(-80)
Step-by-step explanation: