If f(x)=7(x-1)+8f(x)=7(x−1)+8 , what is the value of f(1)f(1) ? Offering 30 points,, please help! will mark brainliest:)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

We just started the introduction into circles and i have no idea how to do this.