Question

Combine like terms, need help ASAP

Answer 1

`15. 7x^(4) - 5x^(4) = 2x^(4) \\17. 6b + 7b - 10 = 13b - 10\\19. y + 4 + 3 ( y + 2 ) = y + 4 + 3y + 6 = 4y + 10\\21. 3y^(2) + 3 ( 4y^(2) - 2 ) = 3y^(2) + 12y^(2) - 6 = 15y^(2) - 6\\23. 0.5 ( x^(4) - 3 ) + 12 = 0.5x^(4) - 1.5 + 12 = 0.5x^(4) + 10.5`