What is the area of this triangle a=bh/2 a: 17m2 b: 30m2 c: 60m2 d: 120m2

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?