Solve for $2\left(1-\frac{1}{2}\right)+3\left (1-\frac{1}{3}\right)+4\left(1-\fra c{1}{4}\right)+\ldots +10\left(1-\frac{1}{10}\right)=?$ Hall please

What is the common denominator for 3/5+3/4

Explain why the two figures below are not similar. use complete sentences and provide evidence to support your explanation. (10 points) figure abcdef is shown. a is at negative 4, negative 2. b is at negative 3, 0. c is at negative 4, 2. d is at negative 1, 2. e

Anyone know? is appreciated! will mark brainliest if correct!