Student council sold tickets to a holiday social. Tickets sold in advance were $12 each and tickets sold at the door the night of the social were $15. Total ticket sales
were $2,400.
A. Write an equation for the total number of tickets sold if x represents tickets sold in
advance and y represents tickets sold at the door.
B. If 90 tickets were sold in advance, how many were sold at the door?

12x + 15y = 2400. 88 were sold at the door

the answer is c.

for continuous functions, they continue in the same pattern and you have to find that pattern kinda like slope

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.