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
g100num [7]
3 years ago
11

An electrician can wire a house in 20 hours. if she works with an apprentice, the same job can be completed in 12 hours. how lon

g would it take the apprentice, working alone, to wire the house?
Mathematics
1 answer:
AlekseyPX3 years ago
4 0
We know that
<span>An electrician can wire a house in ------------> 20 hours
so
100%----------------> 20 hours
 X-------------------> 12 hour
x=12*100/20----> x=60%

that means 
</span><span>the apprentice in 12 hours complete the (100-60)----> 40%

</span>the apprentice in 12 hours complete -------> 40%
x hours------------------------------------> 100%
x=100*12/40-----> x=30 hours

the answer is
30 hours


You might be interested in
What is the product written in scientific notation? (5.91×10−3)⋅(8.7×1010)
romanna [79]

(5.91×10^−3)⋅(8.7×10^10)

= (5.91 x 8.7) x 10^(- 3 + 10)

= 51.417 x 10^7

= 5.1417 x 10^8

Answer is

B. 5.1417 × 10^8



4 0
3 years ago
Read 2 more answers
Which system of equations models the following problem if x represents the number of angelfish Nancy bought and y represents the
alexandr1967 [171]

Answer:2-22=20

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
15-29=
Dominik [7]

Answer:

15-29= -14

(I need the explanation most importantly)

14+(-4) - 8 =10-8=2

(Explanation please)

-8.4 - (19.5.) = - 27.9, (just add them to each other and write -, because both have - in front of them)

(Explanation)

-15 + 8 - (-19.7) = - 7+19,7=12,7 (there is + and - so it will became - 7, and at next there is two - which will turn them into +)

(Explanation)

29.45 - 56.009 - 78.2=−104,759 (all you have to is to put them all together, and than make it 29.45 less, writing - in front of them)

(Explanation)

LAST ONE

45.9 - (-9.2) + 5= 45.9+9.2+5=55.1+5=60.1 (because when there is 2 minus next to each other it will became plus)

6 0
3 years ago
What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2
katen-ka-za [31]

let's recall that the vertical asymptotes for a rational expression occur when the denominator is at 0, so let's zero out this one and check.

\bf \cfrac{5x+5}{x^2+x-2}\qquad \stackrel{\textit{zeroing out the denominator}~\hfill }{x^2+x-2=0\implies (x+2)(x-1)=0}\implies \stackrel{\textit{vertical asymptotes}}{ \begin{cases} x=-2\\ x=1 \end{cases}}

5 0
3 years ago
7kg :420g simplest form​
DENIUS [597]

Answer:

50:3

Step-by-step explanation:

7000g:420  both are divisible by 70

1000:60 both are divisible by 10

100:6  both are divisible by 2

50:3

please mark me as brainliest!!<3

8 0
2 years ago
Other questions:
  • PLEASE HELP!! DUE!!<br> The square pyramid has a volume of 225 cubic inches. What is the value of x?
    6·2 answers
  • Otto used 6 cups of whole wheat flour and x cups of white flour in the recipe. What is the equation that can be used to find the
    7·2 answers
  • Selena is standing on a rock cliff that is 52 feet high. She tosses a pebble upward over the edge, where it hits the top of a 12
    6·2 answers
  • PLEASE HELP !! ILL GIVE 40 POINTS PLUS BRAINLIEST !!
    12·1 answer
  • Find the present worth ofRS.2040 due 4 years hence reckoning interest at 5%p.a.<br>​
    15·2 answers
  • Suppose a basketball team had a season of games with the following characteristics:
    8·1 answer
  • Find the value of x<br> (6x + 7)°<br> (8x - 17)°
    10·1 answer
  • The diameter of the circle is 9.7 m . Calculate the length of its circumference. Round to the nearest tenth and remember to use
    9·1 answer
  • So it's got like money before and after and it has indepent and dependent variable ​
    14·1 answer
  • Math help please!<br> |120+x| x&lt;-120
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!