What is the name of the type of GIS research method that uses proximate observations to estimate values of a variable at places where the variable's value is unknown

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

Is there an x intercept in the equation 60*1.15^x

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem