Please help i don't understand. will mark brainliest. answer the both questions

What is the first step of an indirect proof of a number that is divisible by two

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%