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gizmo_the_mogwai [7]
2 years ago
6

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

ged a total of . What was the rate charged per hour by each mechanic if the sum of the two rates was per hour?
Mathematics
1 answer:
AleksAgata [21]2 years ago
8 0

Answer:

The rate charged by first mechanic per hour= x =$85

The rat charged by second mechanic per hour =y = $70

Step-by-step explanation:

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?

Solution

Let

x= hourly rate of the first mechanic

y= hourly rate of the second mechanic

Derive two equations to solve for the two unknowns

10x + 15y = 1900 (1)

x + y = 155 (2)

From (2)

x + y = 155

x=155-y

Substitute x=155-y into (1)

10x + 15y = 1900

10(155-y) + 15y =1900

1550 -10y + 15y =1900

5y =1900-1550

5y=350

Divide both sides by 5

y= 70

Substitute y=70 into (2)

x + y = 155

x + (70) =155

x=155 - 70

= 85

x= 85

The rate charged by first mechanic per hour= x =$85

The rat charged by second mechanic per hour =y = $70

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Answer:

The answer is: -64

Step-by-step explanation:

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Sam rented a bike one day in the summer. He paid $68 an hour and a rental fee of $85.00 If Sam paid $ 357.00 for the day, how ma
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2 years ago
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Suppose ACT Reading scores are normally distributed with a mean of 21.4 21.4 and a standard deviation of 5.9 5.9 . A university
Nutka1998 [239]

Answer:

29.2

Step-by-step explanation:

Mean = 21.4

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The Z- score formula is given as:

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Using the formula

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Cross multiply

1.341 × 5.9 = x - 21.4

7.7526 = x -21.4

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Step-by-step explanation:

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Andreyy89

Answer:

180

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A+B+C=180

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