Two mechanics worked on a car. the first mechanic worked for 10 hours, and the second mechanic worked for 15 hours. together they charged a total of $ 2650 . what was the rate charged per hour by each mechanic if the sum of the two rates was $ 205 per hour?

The first rate was 120

The second rate was 85

Step-by-step explanation:

r1 = x

r2 = y

10*x + 15*y = 2650

 x + y = 205               Multiply this equation by 10

10x + 10y = 2050       Subtract this equation from the top equation.

10x + 15y = 2650

10x + 10y = 2050

5y = 600

y = 600/5

y = 120

x + y =   205

x + 120 = 205

x = 205 - 120

x = 85

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step-by-step explanation:

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answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.