What is the sum of n natural numbers: 1+2 + ... + n?

A university has 33,660 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of students at the university who speak three or more languages.

Identify which equations have one solution, infinitely many solutions, or no solution s+23-s=4.3+s 25+3=2s+-45 1+4.29-1 = 2.2y+6+2y-4 - 22+2+42 = 14 + 22- 55+2=65+3 - 3.20-2.5 + 2.1p=59- No Solution One Solution Infinitely Many Solutions

Suppose you have 48 bread slices and 38 cheese slices. how many cheese sandwiches can you make?

A microscope has a scale of 250:1. What does this scale mean?

Based on the data set shown, which of the following is a true statement? - 1, - 1, 0, 1, 1, 1, 1, 2, 2, 2, 3

A flagpole casts a shadow 27 feet long. A person standing nearby nearly casts a shadow 8 feet long. If the person is 6 feet tall, how tall is the flagpole

Suppose that 30% of flies are black, and 70% are grey. one fly is chosen at random, what is the probability that the chosen fly is grey?

Show me a step by step work and solve the problem

Can 194/100 be simplified yes it can be simplified or no it cant be simplified

A=1/2h (B+b); A=68, B=8, b=9