Select all equations that can result from adding these two equations or subtracting one from the other. {x+y=12 3x−5y=4

A. 2x−4y=8
B. -2x+6y=8
C. 4x−4y=16
D. 4x+4y=16
F. 2x−6y=-8
G. 5x−4y=28

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.

Ithink i know it but i want to be sure so can you me out ?

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis