Rebekkah

I need help with designing a lab about enzymes. I want to change the amount of enxyme inhibitors as the independent variable, but I don't know what enzyme I could use or what inhibitor I could use. What are some common, easy-to-use enzymes with inhibitors...

how do you solve |4x-5|=|2x+3|

Which requires more fuel- a rocket going from the earth to the moon or a rocket coming from the moon to earth? Please explain why. Thank you so much :)