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AfilCa [17]
3 years ago
10

A can do a piece of work in 4 hours and B can do it in 6 hours. How much time would they take working together to finish the wor

k?
Mathematics
2 answers:
Kipish [7]3 years ago
8 0

Answer:

2.4 hours

Step-by-step explanation:

Let total work = X

Rate of work done = X ÷ time

Rate of A = X/4

Rate of B = X/6

If they work together, rate is the sum of their individual rates, i.e.

X/4 + X/6

= (3X + 2X)/12 (taking LCM)

=5X/12

Rate = X/time

5X/12 = X/time

time = X÷(5X/12)

time = X × 12/(5X)

time = 2.4 hours

Shortcut:

Product of individual times/sum of individual times

= (4×6)/(4+6)

=24/10

=2.4 hours

Whitepunk [10]3 years ago
6 0

Answer:

5 hours

Step-by-step explanation:

A = 4hours

B= 6 hours

Average of A and B = (4hours+6hours)/2 = 5hours

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Answer:

(B) The equation of line is 5 X = 2 Y.

Step-by-step explanation:

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(B) Let X is the pineapple juice and Y is the fruit punch

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2 years ago
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anwer a

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Find the Domain: <br> {(-5, 3), (-1,0), (3, -4), (-1, 2)}
Marrrta [24]

Answer:

(-1,2) is domain

Step-by-step explanation:

5 0
3 years ago
I don’t really get this question can someone help me out
Inessa [10]

angles EFH and GFH are congruents

for the second equivalence criterion  two triangles are equivalents if they have  respectively  2 angles and 1 side congruents

the two triangles have congruents the angle right angle (HGF and HEF) and the 55 degrees angles (EFH and GFH); then they have in common the HF side.

so the triangles are congruent and so all the sides are respectively congruent,for example EH with HG:

EH=HG

s+36=7s

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-6s=-36

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<em>sorry for my english</em>

5 0
3 years ago
A mobile company charges a fixed rate of x cents per minute for the first 120 minutes of talk time and another rate of y cents p
patriot [66]

Answer:

$21.2

Step-by-step explanation:

From the problem given, we express them as algebra so that we can easily solve;

    the total charge on a call greater than 120min is given as;

   120x + y(n - 120) = total cost of call

where n is the number of minutes which is greater than 120;

  •   Ethan paid $26.80  for 175 mins

  n = 175min here;

      120x + y(175 - 120) = 26.80

       120x + 55y = 26.80 ----- (I)

  • $32.40 for 210 minutes

      n = 210min

       120x + y(210 - 120) = 32.4

       120x + 90y = 32.4 ----- (II)

Now let us solve both equations for y and x;

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     120x + 90y = 32.4 ----- (II)

subtract the two equations;

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then x;

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       120x = 18

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Find the cost of 140min of talk time;

  n =140min;

      =  120(0.15) + 0.16(140 - 120)

      = 18 + 0.16(20)

      = 18 + 3.2

      = $21.2

4 0
3 years ago
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