How many tenths are equal to 1/2+4/5?

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.

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

Which expression is equivalent to 5a/4 - b/8 ?