Please help I would appreciate it

Which value of y will make the inequality y< -1 false?

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)