Write “twenty-one and fifty-six thousandths” as a number.

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

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.