Simplify each expression. 25. 4a + 2b + a
28. 4a3 + 6a + 3a3 + 8a
26. 2y + 2x + 8y
29. 6x + 2(2x + 7)
27. x2 + 3x + 2x + 5x2
30. 4(3n +9) + 5n
I really need help with is I have been really overwhelmed with math lately.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?