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
Sholpan [36]
3 years ago
11

rob can tar a roof in nine hours. one day his friend kayla helped him and it only took 4.74 hrs. how long will it take kayla to

do it alone?
Mathematics
1 answer:
jekas [21]3 years ago
7 0
<span>When 2 people work the formula is: Person1 * Person2 / (Person1 + Person2)
</span> 
<span>rob becomes Person1 and Kayla becomes Person 2
 9 * K / (9 + K) = 4.74 Hours
 9*K = 4.74*9 + K*4.74
 9*K = 42.66 + K*4.74 4.26 *K = 42.66 K = 10.014084507 hours (Kayla)
  TESTING the answer (9 * 10.014084507) / (9 + 10.014084507) = 4.74 90.126760563 / (19.014084507) = 4.74
 4.74 = 4.74
</span>
You might be interested in
Are these figures are similar? If so, what is the scale factor?
tester [92]

Answer:

Yes, the scale factor is 0.6 repeating, or 0.7.

Step-by-step explanation:

You find the scale factor by dividing the smaller sides by the corresponding larger ones.

12/18 = 0.6 repeating

14/21 = 0.6 repeating

16/24 = 0.6 repeating

These triangles could be similar by SSS or SAS or ASA I think since congruent angles are shown in both triangles as well.

8 0
2 years ago
Help what is 1/3 to decimal
sleet_krkn [62]

Hey there! I'm happy to help!

To turn a fraction into a decimal, you simply divide the numerator by the denominator!

1÷3=0.3333333333.... (the 3s never end!)

Have a wonderful day! :D

4 0
3 years ago
160% of what number is 19.2
riadik2000 [5.3K]

Answer:

The number is 12

Step-by-step explanation:

Let x be the number

160/100 = 1.6

1.6 x = 19.2

x = 19.2 / 1.6

x = 12

7 0
3 years ago
What is an explicit equation for 5,8,11,14,17
astra-53 [7]
(17-5=12-1=11+8=19-2=(17-3=14)-3=11-3=8-3=5)  wait maybe I got this mixed up with somthing else but...
6 0
3 years ago
50+10+23×61×80 please help mee!!​
Cloud [144]

Answer:

112300

Step-by-step explanation:

50+10+23*61*80

=60+23*61*80

=60+112240

=112300

The answer 112300, hope this helped :)

4 0
2 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP ASAP 35 POINTS
    15·1 answer
  • Find the perimeter of the polygon with the given vertices.
    10·1 answer
  • how do you find the surface area of a rectangular box with length 10 inches,width 6 inches and height 4 inches
    8·1 answer
  • What is -4 divided by -0.2?
    13·1 answer
  • Staci is attending a music festival. The ticket to the festival costs $87.96. Staci plans to purchase $30.00 t-shirts from the e
    15·1 answer
  • The temperature in Antarctica was -51 degrees today while the temperature in Puerto Rico what is the difference between the two
    11·2 answers
  • F(n) = 4n +3<br> g(n) = 3n²+2<br> Find f(n) - g(n)<br> help lol
    13·2 answers
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Csqrt%7B40%7D%20%7D%7B%20%5Csqrt%7B3%7D%20%7D%20" id="TexFormula1" title=" \
    11·1 answer
  • Select the correct numerator 7/9 - ?/27
    5·1 answer
  • URGENT PLEASE HELP WILL GIVE BRAINLIEST!!!!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!