Can somenody with numbers 6,7,12,14(what does 0 represent) and 15(whole thing)

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air