50 POINTS How do you decide which variable to isolate in order to use the substitution method to solve a system of linear equations?

Look to see if any of the variables do not have a coefficient. That would be the most efficient variable to isolate. If there is more than one variable with no coefficient, it doesn’t matter which one you isolate. Isolate the variable and use substitution to solve the system of equations.

Step-by-step explanation:

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

a: 1/6, j: 1/4

step-by-step explanation: you are welcome