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
lubasha [3.4K]
3 years ago
13

If 4 electricians can complete a job in 8 hours how long will it take 3 electricians to complete the same job

Mathematics
1 answer:
levacccp [35]3 years ago
8 0
We know that

if <span>4 electricians can complete a job in 8 hours
then
</span>100% of a job -------> 8 hours
x------------------> 1 hour
x=100/8----> x=12.5%

divide by 4 electricians
12.5%/4-----> 3.125%
that means each electrician can complete 3.125% of a job in 1 hour

therefore
3 electricians-----> 3*3.125%----> 9.375% in 1 hour
so
9.375%-----------> 1 hour
100%--------------> x
x=100/9.375----> x=10.67 hours

the answer is
10.67 hours

You might be interested in
What is the area of this figure?<br><br> Enter your answer in the box.
earnstyle [38]
To find the area you do base times height. Base is the number across,and height is the number that is up and down.So in this case you will multiply 9 and 5 and 9 and 7 and get 45 and 72.Then you will add 45 and 72 together and get 117. So the area is 117. Answer 117. Hope this helps :D.
5 0
2 years ago
Read 2 more answers
2.36 to the nearest whole number
Igoryamba

Answer:

2

Step-by-step explanation:

2.36 would need to be at least 2.50 or higher to be rounded to 3 so we round down to 2

hope this helps <3

7 0
2 years ago
Read 2 more answers
What is the value of x in the figure below?
zhenek [66]
Again, nice problem. These are not super easy. You need to imagine the triangles in the figure and relate sides.

For instance: ADC, its hypotenuse is 15

For ABC, it is 20,

so 20/15 is the ratio between both triangles. Now let's choose the side with 'x'

x is one side of ADC, the corresponding side in ABC is 15 (the second longest sides). You need to rotate the triangles, etc ... That's the tricky part :)

So:

20/15 =15/x ----> x = 15*15/20 = 225/20 = 45/4

Which is C

Not sure whether it's too late to help you though!!!!

Also notice that it's kind of a product rule:

x * 20 = 15 * 15

I am sure the book explains a short way of getting to this equation, like sides opposite, blah blah, but what i told you is the reason. You asked for understanding it! Best luck!
7 0
2 years ago
A zoo train ride costs $3 per adult and $1 per child. On a certain day, the total number of adults (a) and children (c) who took
bearhunter [10]
a+c=30
3a+c=50
c=30-a
3a+30-a=50
2a=20
a=10
a+c=30
10+c=30
c=20

10 Adults and 20 Children 
8 0
2 years ago
10 POINTS AND WILL GIVE BRAINLIEST <br><br>Given: j(x) = -2 (3/2)^x. Find j(0).
FrozenT [24]

Answer:

0

Step-by-step explanation:

j(x) = -2 (3/2)^x

j(0) = -2(3/2)^0

       -2(0)

      =0

8 0
3 years ago
Other questions:
  • A company made a profit of $75,000 over a period of 6 years on an initial investment of $15,000. What is its annualized ROI? 26%
    13·2 answers
  • 750 split in to the ratio 7:8
    14·1 answer
  • A fancy new brand of laundry detergent just launched an aggressive advertisement campaign in the hope that people will use the b
    10·1 answer
  • Help me asap please!!!
    6·1 answer
  • you have a credit card with an initial balance of $3,1168.00 an an interest rate of 12.75%APR. if you make no payments on the ca
    11·1 answer
  • Help as soon as possible please
    12·1 answer
  • Hat is the position of 7 in the number 876,543? A. The ten-thousands place B. The hundreds place C. The tens place D. The thousa
    7·1 answer
  • Andy has 5y dollars. Scott has $12 more then Andy.jacob has 2y dollars less then scott
    8·1 answer
  • HELPPP ASAPPP pleaseee​
    5·2 answers
  • If the measure of ZBEC is (2x+3)° and x = 30, which expression could represent the measure of ZAED?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!