Need help with math points and brainlest

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)