I need helpon my math

Consider the function f(x)=-5x+3 what is f(-2)

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

Find the percent cost of the total spent on each equipment $36, fees $158, transportation $59 a. 14%, 62%, 23% b. 15%, 60%, 35% c. 10%, 70%, 20% d. 11%, 62%, 27%