When testing for current in a cable with eleven color-coded wires, the author used a meter to test three wires at a time. How many different tests are required for every possible pairing of three wires?

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

b. x- 48 =120

step-by-step explanation:

found it xd it ok yt

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is