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aivan3 [116]
3 years ago
9

David can finish painting the room in six hours and his elder brother Anthony can finish it in four hours if both brothers paint

the room together how many hours will it take them and how many minutes
Mathematics
1 answer:
lbvjy [14]3 years ago
5 0

Answer:

2.4 hours

Step-by-step explanation:

David's time = 6 hours

Anthony's time = 4 hours

the combined time is given by the following formula

1/ (david's time) + 1/(anthony's time) = 1/total time

1/6 + 1/4 = 1/Total

4/24 + 6/24 = 1/Total

10/24 = 1/ total   (taking reciprocal of both sides)

24/10 = total

total time = 24/10 = 2.4 hours

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Help!
Olin [163]

Answer:

2/16

1/8

Step-by-step explanation:

8/1=8

2/16=0.125 which is equal to 1/8

2/14=1/7

1/8=1/8 is 2/16 simplified so they are the same

14/2=7

6 0
3 years ago
Solve the system of equations by the substitution method.<br> y = 5x + 6<br> y=9x+7.
joja [24]

Answer:

(-1/4, 19/4)

Step-by-step explanation:

5x+6=9x+7

-4x=1

x= -1/4

y=5(-1/4) +6

y=19/4

3 0
3 years ago
Does 3 tents multiplied by 100 equal 300 thousands
kobusy [5.1K]
0.3 times 100 = 30

300 thousands = 0.300.

No it does not
3 0
3 years ago
Mr. Andrew wants to serve pizza at 1: 10 PM. He has to make the pizza, which takes 15 minutes, and then bake the pizza for 25 mi
Fofino [41]

Answer:

12:30

Step-by-step explanation:

15+25= 40 1:10-40= 12:30

8 0
3 years ago
Name the solid shape that can be formed by each net.
Harlamova29_29 [7]

Answer:

1. cone 2. cube

Step-by-step explanation:

a cube has 6 equal sides, a cone has one round base.

7 0
2 years ago
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