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levacccp [35]
3 years ago
13

Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 5 hours. Together they

charged a total of 2575. What was the rate charged per hour by each mechanic if the sum of the two rates was 170$ per hour?
Mathematics
2 answers:
fiasKO [112]3 years ago
8 0

Answer:

The rate charged by the first mechanic is $115 and the second mechanic is $55.

Step-by-step explanation:

Let, the rate charged by the first mechanic = $x and the rate charged by the second mechanic = $y.

Since, the first mechanic worked for 20 hours and the second mechanic worked for 5 hours.

Thus, the total rate charged by both the mechanics is (20x+5y).

As, they were charged total $2575.

So, we get, 20x+5y = 2575.

Moreover, the sum of the rate is given to $170.

This gives us, x + y = 170

So, we get the system of equations as,

20x+5y = 2575 i.e. 4x + y = 515

x + y = 170

Now, we will solve the equations by subtracting them both,

We get, 3x = 345 i.e. x = 115

So, y = 170 - x i.e. y = 170 - 115 i.e. y = 55

Hence, the rate charged by the first mechanic is $115 and the second mechanic is $55.

SashulF [63]3 years ago
8 0

Answer:

x=115  by first mechanic and y=55 by second mechanic.

Step-by-step explanation:

Let the first mechanic charge be x

And the second mechanic charge  be y

First mechanic worked for 20 hours that means 20x

And second mechanic worked for 5 hours that means 5y

in total they charged for  2575

So, 20 x + 5 y =2575 (1)

And Sum of two rates was:  x+y=170  (2)

Solving above two equations  (1) and (2) we get:

x=115 and y=55.

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Svetlanka [38]

Answer:

18- 300

20- 1,500

22- 300

Step-by-step explanation:

You can easily find the answer like this:

18. Multiply 60 and 100 together. The hundred is from 100%. After that, divide it by 20 because of the percent. After doing this, you should get 300.

20. 360*100=36,000 36,000/24= 1,500

22. 9*100=900 900/3=300


I hope this is what you were looking for. If you need more out of this, ask me to answer it again. :)

5 0
3 years ago
What is the largest integer n such that (n^2-38) / (n +1) is an integer?
Phantasy [73]

Answer:

a. 36

Step-by-step explanation:

for (n^2-38)/(n+1) to be an integer, n+1 must completely divide, n^2-38.

we check with the options

option a n=36 sutisfies the above condition.

(36^2-38)/36+1 = 1258/37= 34 , which is an integer. Therefore, largest integer would be 36

6 0
3 years ago
Help please???????????????
irinina [24]

Answer: 3/4 as a decimal is 0.75


Step-by-step explanation: 0.75 is the percent. so it is 75%

Hope this helps :)

4 0
3 years ago
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inysia [295]

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172.8 people got a gift card

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6 0
3 years ago
899 round to the nearest ten
algol [13]
900 because 9 is greater than 5 so it rounds to my answer.
6 0
2 years ago
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