Max is stacking logs at his campground for firewood. after his first load of logs, he has 9 logs on the stack. after his seventh load of logs, he has 51 logs on the stack. use sequence notation to represent the arithmetic function.
a an = 51 + 6(n − 1)
b an = 9 + 6(n − 1)
c an = 51 + 7(n − 1)
d an = 9 + 7(n− 1)

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?