50 points! what is the solution for the system of equations? use the substitution method to solve. 2x+y=20 −5y=−6x+12 show your work!

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

How to use order of operation in 20 divide by 4 multiply 5 = 1