What is the average rate of change of f(x), represented by the graph, over the interval [0,2]? a: 2 b: 1 c: 0.5 d: -0.5

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

How to do this , and can some one explain