If w is 25% of z, then z: w is 75: 25.
is it true or false? ?

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.

2x minus y equals 6, x plus y equals negative 3

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle