1answer.
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
lys-0071 [83]
2 years ago
7

Two workers finished a job in 12 days. How long would it take each worker to do the job by himself if one of the workers needs 1

0 more days to finish the job than the other worker
Mathematics
2 answers:
Lorico [155]2 years ago
8 0

Two workers finished a job in 7.5 days.

How long would it take each worker to do the job by himself if one of the workers needs 8 more days to finish the job than the other worker?

let t = time required by one worker to complete the job alone

then

(t+8) = time required by the other worker (shirker)

let the completed job = 1

A typical shared work equation

7.5%2Ft + 7.5%2F%28%28t%2B8%29%29 = 1

multiply by t(t+8), cancel the denominators, and you have

7.5(t+8) + 7.5t = t(t+8)

7.5t + 60 + 7.5t = t^2 + 8t

15t + 60 = t^2 + 8t

form a quadratic equation on the right

0 = t^2 + 8t - 15t - 60

t^2 - 7t - 60 = 0

Factor easily to

(t-12) (t+5) = 0

the positive solution is all we want here

t = 12 days, the first guy working alone

then

the shirker would struggle thru the job in 20 days.

Jobisdone [24]2 years ago
8 0

Answer:7 + 17 = 24÷2 (since there are 2 workers) =12. Also, ½(7) + ½17 = 3.5 + 8.5 = 12. So, we know that the faster worker will take 7 days and the slower worker will take 17 days. Hope this helps! jul15

Step-by-step explanation:

You might be interested in
If lin runs 24 laps at the same rate how long does it take her
sveta [45]

Answer:

is that all

Step-by-step explanation:

if she runs 24 laps a minute then the next minute she would of ran 48

5 0
2 years ago
Read 2 more answers
Please help!! ill give BRAINLIEST!!!
kenny6666 [7]

1. Isosceles, right.

2. Scalene, right.

3. Equilateral, acute.

4. Scalene, acute.

5. Isosceles, acute.

6. Scalene, obtuse.

7. Scalene, obtuse.

8. Scalene, obtuse.

9. Equilateral, acute.

10. Isosceles, obtuse.

3 0
3 years ago
Read 2 more answers
What is the name of the pattern block used to cover half the hexagon called
Musya8 [376]
The answer would be a trapezoid.
7 0
2 years ago
Read 2 more answers
Find the missing length of the right triangle.<br> a<br> 21<br> 35
WITCHER [35]

Answer:

28

Step-by-step explanation:

Use the pythagorean theorem and solve for a:

a² + b² = c²

a² + 21² = 35²

a² + 441 = 1225

a² = 784

a = 28

So, the missing length is 28.

4 0
2 years ago
Plz help me out I rlly can’t get it
joja [24]
<h3>I'll teach you how to solve (sqrt 9)^2 +5</h3>

-------------------------------------------------

(sqrt 9)^2 +5

Apply radical rule:

(9^1/2)2

Apply exponent rule:

9^1/2*2

1/2* 2= 1

=9

9+5= 14

Your Answer Is 14

plz mark me as brainliest :)

4 0
2 years ago
Other questions:
  • ...........................
    11·1 answer
  • Determine the number of diagonal of a dodecagon?
    7·1 answer
  • Khaleem wanted to draw a triangle where the sides measured 5 cm, 8 cm, and 7 cm. How many unique triangles could Khaleem draw th
    13·2 answers
  • Find the mean absolute deviation (MAD) of the data in the pictograph below
    15·2 answers
  • X is greater than -9 and less than or equal to 4 use x only once in your inequality
    9·1 answer
  • I just need help with these math questions
    13·2 answers
  • An urn contains 8 green and 9 white balls. Six balls are randomly drawn from the urn in succession, with replacement. That is, a
    14·1 answer
  • A scientist wanted to measure the constant rate of the current in a particular section of the river. She released a tracker into
    5·1 answer
  • Mr. Kugler gave the same geometry test to his 1st and 2nd period classes. The box and whisker plot summarizes the scores of each
    11·2 answers
  • PLEASE HELP! Will give brainliest! A bag contains 5 pink marbles and 6 green marbles. Two marbles will be selected one at a time
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!