Evaluate each expression if y=2 question 8y to the power of -4

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?

Find an equation of the line that has intercepts (1,0) and (0,4).