I hope this helps you
-15+6= -9
-9+6= -3
-3+6=3
add 6
You can buy 7 flats of flowers. this is because 10.99 is close to 11.00, and 7 x 11 is 77. and you cant do 77 + 11 to get less then 80.
the answer: 7 flats of flowers
hope it helps :)
Sorry I don’t really know
For y u add 2 and x add one