Solve the following equation
4a - 4 = 8 +a

Given: ac and db are diameters. m∠3=

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table