Find the sum of the first 40 terms of an arithmetic progression with first term equal to 6 and second term equal to 16.​

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

Which best explains why this triangle is or is not a right triangle?