The weights of their backpacks would be discrete
I believe the equation would be 765 -8t = 421. Then you would solve for t and get 43 seconds. I hope this helps!! :)
Answer:

Step-by-step explanation:




Hope this helps!
Answer:
Scalene
Step-by-step explanation:
Scalene triangles always have unequal side lengths. Thia triangle has unequal side lengths, therefore it is considered scalene.
I’m pretty sure the correct answer is B