15: A data set consists of three numbers, a, b, and c. Write an algebraic expression, in terms of a, b, and c, to represent the mean of the
new set of numbers obtained by
"adding 5 to every number in the set."
"doubling every number in the set."
"halving every number in the set"

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.

How do you solving the solution of each system using elimination?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.