the sum of three consecutive integers is three times the second integer. show that this is true for the three consecutive integers 7,8 and 9

A=1/2h(b1+b2) is the formula for the area of a a trapezoid b regular polygon c triangle d rhombus or kite

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Evaluate the expression. (9 + 5)(3 + 2)0