Can someone pls pls help me?

Simplify the expression. -2/5(10+15m-20n)

Write the expression as a single natural logarithm. 2 in a - 4 in y

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint