( 3u + 7 )( 5 - u )= 0

What signals you that factoring by grouping is the best method to use when factoring a problem?

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.

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"