Can someone do this for me pls I’ll give brainliest

Let r = 3. what is the value of r + 58?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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?