Answer:
https://www.khanacademy.org
Step-by-step explanation:
Khan Academy is free and you can choose by grade level or course. It's a personalized learning experience with videos and practice exercises that includes progress tracking.
Answer:
B, C, A, B
Step-by-step explanation:
Answer:
No!
Step-by-step explanation:
Hope that helped
Answer:
2t + 9
Step-by-step explanation:
5 and 4 are like terms. 3t and -t are like terms
= 2t + 9
or 9 + 2t
