Mr. David drove from his home to his work place. For the first 1.2 hours, he travelled at a constant speed of 65 km/h. For the next 2.3 hours, he travelled at a constant speed of 70 km/h. What was the average speed for the whole journey? km/h

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

12 is it do you think so

the pseudoscience are like beliefs, theories, or like practices that are considered scientific