If y varies directly as x, and y=-4 when x=8, find y when x=3

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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.