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
yanalaym [24]
3 years ago
14

What is the value of r, the part of the job that Marina can complete in 1 hour?

Mathematics
1 answer:
EastWind [94]3 years ago
5 0

Answer:

0.4

Step-by-step explanation:

so, Katherine can do 0.1 of the job per hour. (if she needs 10 hours for the job, each hour she can do the whole divided by the time, so 1/10, which is 0.1)

if in two hours she and Marina can be done, then Marina will do 1(the whole job)-2/10 (twice as much as she can do in an hour)=0.8 of the job. So if Marina does 0.8 of the job in two hours, each hour she will do half of it: 0.4 - and this is the correct answer 

You might be interested in
What is the interquartile range
motikmotik

<em>Answer:</em>

<em></em>

<em>Step-by-step explanation:</em>

<em>Khan academy huh?</em>

  • <em>put the numbers in order from least to greatest.</em>
  • <em>find the median</em>
  • <em>find the difference between the median and all of the other numbers.</em>

<em></em>

<em></em>

<em>P.S. If you were looking for somebody to tell you the answer don't hold your breath.</em>

8 0
3 years ago
Substitution: y-2x=-6 and 5x-y=9
Dmitrij [34]
<span>y-2x=-6 and 5x-y=9   

step 1: isolate y in the first equation

y = 2x - 6

step 2:  substitute the y value on the 2th equation:

5x-(2x-6)=9

step 3:  solve the present equation:

5x - 2x + 6 = 9
3x = 9-6
3x = 3
x = 1

step 4: get the y value by replacing the value of x in </span>y = 2x - 6:
<span>
y = 2*1 - 6
y = 2 - 6
y = -4

S={1, -4}



</span>
7 0
3 years ago
Read 2 more answers
Please only do 2 through 6
finlep [7]

<u>The systems and procedures in banks must be designed to make customers feel safe about carrying out electronic banking transactions. To achieve this, banks must put in place:</u>

<u>The systems and procedures in banks must be designed to make customers feel safe about carrying out electronic banking transactions. To achieve this, banks must put in place:appropriate systems and procedures to ensure safety and security of electronic banking transactions carried out by customers</u>

3 0
2 years ago
Simplify the expression. 35(12)(5)
Furkat [3]

Answer:

the answer is 2100

Step-by-step explanation:

7 0
3 years ago
What is the value of 3x+3y?
NNADVOKAT [17]

Answer:

3(x+y)

Step-by-step explanation

this is the right answer

7 0
3 years ago
Other questions:
  • Does two eighths equal one fourths ?
    7·2 answers
  • A quadrilateral with vertices (-3,2),(-5,-4), (4,6), and (7,0) is dilated by a scale factor of 0.5.
    13·1 answer
  • What is the value of n?<br><br> A. 24 <br> B. 9<br> C. 26<br> D. 14
    9·1 answer
  • If bacteria took 20 minutes to double from 2 to 4, how many bacteria would there be after 1 hour
    8·2 answers
  • $1,500 at 2.9% interest for 18 months<br> What is the interest?<br><br> What is the new balance?
    12·2 answers
  • PLS HELP ASAP, ILL MARK BRAINLIEST IF ITS A REAL ANSWER. LOOK AT THE PICTURE !
    6·1 answer
  • Help meeeeeeeeeeeeeeeeeeeeee
    6·2 answers
  • Mrs. Adams made 120 cookies. she gave 2/3 of them to guiding star children's home. How many cookies does she have left?
    11·2 answers
  • 17
    8·1 answer
  • 2. Suppose that you are looking for a student at your college who lives within five miles of you. You know that 55% of the 25,00
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!