Andre came up with the following puzzle. “i am three years younger than my brother, and i am 2 years older than my sister. my mom's age is one less than three times my brother's age. when you add all our ages, you get 87. what are our ages? ”

Ihonestly don’t understand this at all

Based on the figures as marked, /\rqs = —

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.