Another question I don’t know how to do is ( by the way permutations + combination unit ) The number of 4 digit numbers are there that contain no 5’s is?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?