Hi help plz lot of pointss

Will give brainliest! aubrey was offered a job that paid a salary of $45,000 in its first year. the salary was set to increase by 2% per year every year. if aubrey worked at the job for 20 years, what was the total amount of money earned over the 20 years, to the nearest whole number?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?