Julie wrote the rate $108 in 6 weeks as a unit rate. find her mistake and correct it

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

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.

X+y=-4 x-y=2 use elimination with adding and subtraction