Question 6 A plumber charges a base fee for all service appointments. If a repair is needed, he adds a charge for each hour of labor. If the total cost, y, in dollars, of the plumber's x-hour repair visit is modeled by
the equation y = 25x + 30, what could the 30 represent?

the 30 is the base number,or where the line begins on the graph

Step-by-step explanation:

It represents the base fee

Step-by-step explanation:

Well we know he charges a flat rate for even making an appointment (probably because he needs to get to a client), and then charges an hourly rate. Thus, anything in his formula that's multiplied by the number of hours must be the hourly rate (25 here) and whatever is constant must be the base fee (30 here).

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.