Sid says that the solution to the equation shown below is 2. However, he has made a mistake. 4 (2+2) = 2 (2 – 3) – 50
What mistake did Sid make and what is the correct solution? Explain your thinking.

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle