Find the solution of each equation if the replacement sets are a= { 4,5,6,7,8 } and b= { 9,10,11, 12,13 }. 4a - 8 = 16

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.