The perimeter of an equilateral triangle is 39 centimeters. What is the length of an altitude of the triangle ?

0.75,1.75,2.75,3.75 is arithmetic or geometric?

Can someone answer and tell me how to do this (will mark brainliest)

Function t=-h+2 models the temperature in greenville the temperature t is measured in degrees fahrenheit and h represents the hours after midnight on a piece of paper graph the function then determine which answer choice matches the graph you drew find the y-intercept of the line