Witch expression is equivalent to 5x-30

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

How do i do this? i don’t understand

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?