A triangle has a perimeter of 27.6 centimeters. Two of the sides measure 6.9 centimeters and 11.5 centimeters. What is the length of the third side?
please help!

9.2cm

Step-by-step explanation:

Let the sides be a, b and c

Let the unknown side be c

a = 6.9cm

b = 11.5cm

c =?

P = 27.6cm

P = a + b + c

27.6 = 6.9 + 11.5 + c

27.6 = 18.4 + c

Collect like terms

27.6 — 18.4 = c

c = 9.2

Therefore, the length of the third side is 9.2cm

0.953081279

Step-by-step explanation:

we have been given the following data set;

x; 4, 5, 8, 9, 13

y; 2, 9, 10, 12, 23

We are required to determine the r value of the data set.The r-value is the correlation coefficient that is used to measure the degree of association between two variables. It gives us information on the strength and direction of the association.

We can easily compute r in Ms. Excel;

We first enter the data into any two adjacent columns of an excel workbook.

Then we proceed to type;

=CORREL

into any blank cell. This is an in-built function that computes the correlation coefficient. Ms. Excel returns a value of  0.953081279

as the r value