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Leto [7]
3 years ago
9

Two mechanics worked on a car. The first mechanic charged $75 per hour, and the second mechanic charged $45 per hour. The mechan

ics worked for a
combined total of 25 hours, and together they charged a total of $1425. How long did each mechanic work?
Mathematics
2 answers:
Nat2105 [25]3 years ago
6 0

Answer:

First mechanic 10 hours, Second is 15 hours

Step-by-step explanation:

x + y = 25, so y = 25 - x

75x + 45y = 1425

Substitute in the first equation

75x + 45(25 - x) = 1425

75x + 1125 - 45x = 1425

30x = 300

x = 10

Therefore, y = 15

pogonyaev3 years ago
4 0

Answer:

they both worked

8 hours

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alexgriva [62]

Answer:

x = 20

Step-by-step explanation:

This isn't too difficult once you understand it.

The bottom left angle of the left triangle (on the other side of 110), that angle is congruent to the 70 degrees angle. that angle is 70 degrees. y = 90 degrees, 90 + 70 = 160

180 - 160 = 20

4 0
3 years ago
You start driving north for 6 miles, turn right, and drive east for another 19 miles. At the end of driving, what is your straig
Anton [14]

Answer:

Okay, here's the method I'm going to use.

If you drive north 6 miles, and then drive east 19 miles, you are technically making a triangle.

                    19 miles

           l_______________

6 milesl

           l

You are just missing the last side of the triangle: the straight line stretching from across your starting point to the ending point. You can find this by using the Pythagorean theorem.

a^2 + b^2 = c^2

6^2 + 19^2 = c^2

36 + 361 = c

397 = c

\sqrt{397} = 19.924859

Rounded to the nearest tenth, your answer is

19.9 miles

5 0
3 years ago
What is (-1/4) - (-3/5)?
Nostrana [21]
.35 Hope this helps :)

6 0
3 years ago
Linear equation <br><br> 4.5 + 1.5y=24<br> x-y=4
WARRIOR [948]
4.5x + 1.5y = 24 ⇒ 4.5x + 1.5y = 24
1.0x -  1.0y = 4   ⇒<u> 4.5x - 4.5y = 18</u>
                                             <u>6y</u> = <u>6</u>
                                              6     6
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                                 <u>         - 1.5    - 1.5</u>
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                                           4.5      4.5
                                               x = 5
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8 0
4 years ago
Please answer the following Question (35 Points)
True [87]

Answer:

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14

Step-by-step explanation:

7 0
2 years ago
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