answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alina1380 [7]
2 years ago
3

Two​ mechanics, Bonita Rich, ​and Pamela​ Pearso​n, take 7 hours to rebuild an engine when they work together. If each worked​ a

lone, Bonita, the more experienced​ mechanic, could complete the job 3 hours faster than Pamela. How long would it take each of them to rebuild the engine working​ alone?
Mathematics
1 answer:
sukhopar [10]2 years ago
7 0

Answer:

  • Bonita: 12.66 hours
  • Pamela: 15.66 hours

Step-by-step explanation:

Let b represent the number of hours it takes Bonita to rebuild an engine. Then b+3 is the number of hours it takes Pamela. When they work together, their total rate of work in "rebuilds per hour" is ...

  1/b + 1/(b+3) = 1/7

Multiplying by the product of the denominators, we have ...

  7(b+3) +7b = b(b+3)

  b² -11b = 21 . . . . . . . . . subtract 14b

  b² -11b +30.25 = 51.25 . . . . complete the square by adding (11/2)^2

  (b -5.5)² = 51.25 . . . . . . . . . . write as a square

  b = 5.5 + √51.25 . . . . . take the square root and add 5.5

  b ≈ 12.65891 . . . . hours

Working alone, Bonita could rebuild an engine in about 12.66 hours; Pamela could do it in about 15.66 hours.

You might be interested in
Jane wants to add chocolate chips to her trail mix. A 3-pound bag of chocolate chips costs $3.22. What is the unit price?
IrinaVladis [17]

Answer:

$1.07 per bag

Step-by-step explanation:


5 0
2 years ago
Read 2 more answers
g A car company is testing a new type of tire. They want to determine the stopping distance if the car has anti-lock brakes or n
Keith_Richards [23]

Answer:

Road conditions

Step-by-step explanation:

The factor that should be mostly considered in this case is the Road conditions, that way the tyre with the best stopping distance can be determined.

6 0
2 years ago
A church has 8 bells in its bell tower. Before each church service 5 bells are rung in sequence. No bell is rung more than once.
Basile [38]
Use the ! tool to find the # of combinations.

8!/5! = 40,320/120 = 336
8 0
2 years ago
Read 2 more answers
What is the value of k in the equation below? 5k - 2k = 12? 1 1/5, 1 5/7, 3, 4
valkas [14]
Hi there!

5k - 2k = 12
Solve for K
3k = 12
Divide both sides by 3
3k/3 = 12/3
k = 4
The correct answer is : 4


I hope that helps!
Brainliest answer :)
8 0
2 years ago
Read 2 more answers
Resource Allocation You manage an ice cream factory that makes two flavors: Creamy Vanilla and Continental Mocha. Into each quar
vovikov84 [41]

Answer:

in order to use up all the eggs and cream, the number of quarts of each flavor that should be made is;

Creamy vanilla x = 200 quarts

Continental mocha y = 100 quarts

Step-by-step explanation:

Let x and y represent the number of quarts of Creamy Vanilla and Continental Mocha that should be made in order to use up all the eggs and cream respectively.

For Creamy Vanilla go 2 eggs and 3 cups of cream

For Continental Mocha go 1 egg and 3 cups of cream.

Total number of eggs = 500 eggs

Total number of cream cups = 900 cups.

For the eggs;

2 eggs × x + 1 egg × y = 500

2x + y = 500 .......1

For the cream cups;

3 cups × x + 3 cups × y = 900

3x + 3y = 900

Dividing through by 3

x + y = 300 .......2

Solving the simultaneous equation;

Subtracting equation 2 from 1

(2x + y) - (x+y) = 500-300

2x -x = 200

x = 200

Substituting x = 200 into equation 2;

200 + y = 300

y = 300 - 200

y = 100

Therefore, in order to use up all the eggs and cream, the number of quarts of each flavor that should be made is;

Creamy vanilla x = 200 quarts

Continental mocha y = 100 quarts

8 0
2 years ago
Other questions:
  • What can you say about the end behavior of the function f(x)=-4^6+6x^2-52 ????
    6·1 answer
  • the lines shown below are parallel. if the green line has a slope of -4, what is the slope of the red line
    11·2 answers
  • In a rectangle, a diagonal forms a 36° angle with a side. Find the measure of the angle between the diagonals, which lies opposi
    15·1 answer
  • Which classification best describes the following system of equations? 3x+6y-12z=36 x=2y-4z=12 4x+8y-16z=48 inconsistent and dep
    5·1 answer
  • lauren graphed the relationship between how many days had passed since she planted a cactus and it’s height (in centimeters)
    5·2 answers
  • Suppose a given control unit fails, on average, every 12,000 hours. It takes an average of 900 hours to repair and reboot this u
    10·1 answer
  • Mr. Barrow scored his high school students' essays on a scale of 0 to 10. He recorded data about the scores in the table below.
    8·2 answers
  • A survey was conducted in a large city to investigate public opinion on banning the use of trans fats in restaurant cooking. A r
    8·1 answer
  • Multiply 8674 x 678 is what
    5·1 answer
  • Use the hundredth grids below to answer the questions. The first two hundredth grids show Sophia's work. The second two hundredt
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!