HELP PLEASE!!!

I need to find the radius, diameter, circumference, and the area of 10in

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

What ia the sum if the first 7 terms of the geometric series

Angie has saved 3/8 of the amount she needs to buy a bike. clive has saved 7/10 of the amount he needs to buy a skateboard. what is the difference between clive's and angie's fraction of savings?