Answer:
25a-20
Step-by-step explanation:
15a+10a-20=
Answer: the answer is 88.2 and your welcome!!
Tan x=31
x= tan^-1 (31)
x=88.2 degrees
f⁻¹(x) = 8x - 1
Swap the positions of y (f(x)) and x and solve for y.