the question is from the subject discrete math
how many 6-element subsets of a = {0,1,2,3,4,5,6,7,8,9} have exactly three even
elements? how many do not have exactly three even elements?

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 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 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?