What is the range of numbers along the lines of longitude or meridians?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac

Drag the tiles to the correct boxes to complete the pairs. using the properties of integer exponents, match each expression with the correct equivalent expression.