Ile jest liczb całkowitych ktorych odleglosc od 3 na osi jest mniejsza od 7 ?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?