Zachary traveled from city A to city B. He left city A at 7:30 a. m. and reached city B at 12 noon. Find his average speed if city B is 180 mi away from city A. Please include the units after the answer!

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.

Simply 8x squared + 5(7x squared- x) - 2x =

What is 140% of 25? because i need