A plumber says it will cost at least $640 for parts and labor to repair a sink. The cost of the parts is $123 and the plumber charges $110 per hour for labor. How many hours is he planning to work? Write an inequality and solve. Write your answer in a sentence.

40 + 75x = 125 + 25x

Step-by-step explanation:

t takes 5 hours of work for each to cost the same.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0