Given the arithmetic series: a + 13 + b + 27 + ...
2.1.1
Show that a=6 and b = 20
2.1.2
Calculate the sum of the first 20 terms of the series.​

At least two people have the same birthday in a school of 150 students

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

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15