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
elena55 [62]
3 years ago
7

A can do a work in 14 days and working together A and B can do the same work in 10 days. In what time can B alone do the work? (

i dont get this one, please explain :)
Mathematics
1 answer:
vivado [14]3 years ago
5 0

Answer:

35 days

Step-by-step explanation:

A = 14 days

It means per day, work done by A= 1 / 14

A+B = 10 days

Work done by A and B per day = 1 / 10

In what time can B alone do the work?

To solve this, we have

A+B = A alone + B alone

1/10 = 1/14 + B alone

Subtract 1/14 from both sides

1/10 - 1/14 = 1/14 + B alone - 1/14

14-10/140 = B alone

4/140 = B alone

B alone= 1 / 35

Work done of B alone = 1/35

B alone will do the work in 35 days

You might be interested in
If all perpendicular lines are also intersecting lines, are all interesting lines also perpendicular lines? Explain, you'r answe
DerKrebs [107]

No.

Perpendicular lines are lines that intersect at a 90° angle.

If two lines are perpendicular, they create four 90° angles.

However, for two lines to intersect, they do not necessarily have to intersect at a 90° angle.

<em>All roses are flowers, but not all flowers are roses.</em>

<em>All perpendicular lines are intersecting lines, but not all intersecting lines are perpendicular.</em>


3 0
3 years ago
1
Kazeer [188]

Answer:

h = A*2/a+b

Step-by-step explanation:

5 0
3 years ago
The sum of the heights of a giraffe and a baby giraffe is 15m. If the baby giraffe has a height which is 2/3 that of the giraffe
EleoNora [17]

mama giraffe: x

baby giraffe: \frac{2}{3} x

x + \frac{2}{3}x = 15

(3)x + (3)\frac{2}{3}x = (3)15

3x + 2x = 45

5x = 45

x = 9

baby giraffe: \frac{2}{3} x = \frac{2}{3}(9) = 2(3) = 6

Answer: 6 m

8 0
3 years ago
Read 2 more answers
Is the discriminant positive negative or zero?
vitfil [10]

Answer:

Sorry the picture is blocked on my chromebook but i hope this helps

Step-by-step explanation:

A positive discriminant indicates that the quadratic has two distinct real number solutions. A discriminant of zero indicates that the quadratic has a repeated real number solution. A negative discriminant indicates that neither of the solutions are real numbers.

6 0
3 years ago
A coin is flipped five times. Find the number of possible sets of heads and tails that have at most 3 heads
Mumz [18]

Answer:

Sets = 27

Step-by-step explanation:

Given

Coin = 1

Toss = 5

Required

Number of outcomes with at most 3 heads

First, we list out the sample space of a toss of coin 5 times

(HHHHH), (HHHHT), (HHHTT), (HHTTT), (HTTTT), (TTTTT), (TTTTH), (TTTHH), (TTHHH), (THHHH), (HTHTH), (THTHT), (HHTHH), (TTHTT), (HTTHT), (THHTH), (THHHT), (HTTTH), (THHTT), (HTTHH), (HHTTH), (TTHHT), (TTHTH), (HHTHT), (HTHTT), (THTHH), (THTTH), (HTHHT), (HTHTT), (THTHH), (HHHTH), (TTTHT)

Next, we list out all outcomes with at most 3 heads

, , (HHHTT), (HHTTT), (HTTTT), (TTTTT), (TTTTH), (TTTHH), (TTHHH), , (HTHTH), (THTHT), , (TTHTT), (HTTHT), (THHTH), (THHHT), (HTTTH), (THHTT), (HTTHH), (HHTTH), (TTHHT), (TTHTH), (HHTHT), (HTHTT), (THTHH), (THTTH), (HTHHT), (HTHTT), (THTHH), (TTTHT)

So, the number of set is:

Sets = 27

4 0
3 years ago
Other questions:
  • w trójkącie równoramiennym abc podstawa AB ma długość 10cm. Odcinek AD jest wysokością tego trójkąta. Wiedząć że |DB|=6cm,oblicz
    10·2 answers
  • There are 8 boys in a class of 15 students. (a) what is the ratio of boys to girls? (b) whatis the ratio of all students in clas
    13·2 answers
  • Whoever helps with number 5 gets brainliest answer and 10 points :)
    9·2 answers
  • What is the positive interval of 4x-2y=8
    9·1 answer
  • Find the solution to the following system using substitution or elimination: y = 3x + 2 y = -2x - 8 O A. (-5,-) OB. (-2,-4) O C.
    15·1 answer
  • Of the smoothies sold yesterday at Marlins smoothie shop, 5/6 were banana and another 1/12 were strawberry . What fraction of th
    6·1 answer
  • Answer the following and provide if the answer is negative or positive.
    9·2 answers
  • Jay is trying to calculate his grade for his math class. If his test scores are 87, 80, 96, 94, and 88, what is his average grad
    5·1 answer
  • Evaluate the power: (−3)^4<br> A. 81<br> B. -81<br> C. 243<br> D. -331
    9·2 answers
  • A geometry student named Cornell claims that the two triangles in the diagram below are similar to one another. He asserts that
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!