2x2-4? OML I HAD LIKE 1300 POINTS A A MOD NAMED laurenercsp6fpli DELETED ALL MY ANSWERS! I WAS ON THE LEADERBOARD!

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).

The temperature of chicken soup is 192.7°f. as it cools, the temperature of the soup decreases 2.3°f per minute. what is the temperature in degrees fahrenheit of the soup after 25 minutes? a. 27.3°f b. 57.5°f c. 135.2°f d. 250.2°f

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)