What is the perimeter of a triangle with the given side lengths?

s1 = 2x + 1 cm
s2 = 3x + 2 cm
s3 = x + 3 cm

What is the anwers for 9+2x=5x-3-x

Astudent is solving a system of equations by substitution and comes up with the solution 3 = 3. assuming that he solved the problem correctly, which of the following can be said about this system of equations?

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean