What is the value of the expression –12 – 3 + 9?

a.
–15

b.
–6

c.
0

d.
22

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Nine more than four times a number is the same as one less than twice the number. find the number?

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?