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saw5 [17]
3 years ago
9

David can finish painting the room in 6 hours, and his elder brother Antony can finish it in 4 hours. If both brothers paint the

room together, how many hours will it take them?
Mathematics
1 answer:
erica [24]3 years ago
7 0

Answer:

Step-by-step explanation:

1/6+1/4=5/12

5/12 of the job is done in 1 hour

so

5/12+5/12= 10/12

so 10/12 of the job is done in 2 hours

and then simplify 5/6 so then add 1/6

so it is done in 2 hours and 24 minutes

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The equations 2 x minus 5 y = negative 5, 11 x minus 5 y = 15, 9 x + 5 y = 5, and 14 x + 5 y = negative 5 are shown on the graph
Dafna11 [192]

Answer:

See attached graph

Step-by-step explanation:

8 0
3 years ago
How to find what is force if pressure and are is given please answer I will mark brainiest
levacccp [35]

Answer: Pressure and force are related, and so you can calculate one if you know the other by using the physics equation,

P = F/A. Because pressure is force divided by area,

its meter-kilogram-second (MKS) units are newtons per square meter,

or N/m2.

4 0
3 years ago
Why is radian measure used in Geometry?
Vladimir [108]
The infinite series description of trig functions is much neater when the argument is radians. For example, for small angles, sin(x) ≈ x when x is in radians. You could say that radians is the "natural" measurement unit for angles, just as "e" is the "natural" base of logarithms.

If the angle measure were degrees or grads or arcseconds, obnoxious scale factors would show up everywhere.
3 0
3 years ago
Point B ∈ AC. Find the length of segments AB and BC if AC = 20 cm and: AB:BC = 3:7
madam [21]

Answer:

Length of AB  = 6 cm

Length of the segment BC =  14 cm

Step-by-step explanation:

Here, B is a point on a segment AC.

AB : BC = 3:7

Length of the segment AC = 20 cm

Now, let the common ratio between the segment is x.

So, the length of AB = 3 x , and Length of BC = 7 x

Now, AB + BC = AC

⇒  3x + 7x = 20

or, 10 x = 20

or, x = 2

Hence, the length of AB = 3 x = 3 x 2 = 6 cm

and the length of the segment BC = 7x =  7 x 2 =  14 cm

7 0
3 years ago
Read 2 more answers
I am not sure on how to do this ​
sweet [91]

Answer:

CP = 8 cm

Step-by-step explanation:

Given two chords that intersect inside a circle, then then the product of the parts of one chord is equal to the product of the parts of the other chord, that is

DP × CP = AP × PB ← substitute values

6 × CP = 12 × 4

6CP = 48 ( divide both sides by 6 )

CP = 8

8 0
2 years ago
Read 2 more answers
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