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 $1900. what was the rate charged per hour by each mechanic if the sum of the two rates was $155 per hour?

For this case we propose a system of equations:

Let "x" be the variable that represents the hourly rate of the first mechanic.

Let "y" be the variable that represents the hourly rate of the second mechanic.

We have to:

We clear "x" from the second equation:

we substitute in the first one:

Thus, the second mechanic charges $ 70 per hour.

So, the first mechanic charges $ 80 per hour,

The first mechanic charges $ 85 per hour,

The second mechanic charges $ 70 per hour.

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb