If Jan takes exactly 21 minutes to walk to school each day, and her school is 2.8 miles away, what is her average walking speed (rounded to the nearest tenth)?

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

anchor = archer //

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.