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8_murik_8 [283]
3 years ago
14

It takes 7 hours for 12 people to

Mathematics
2 answers:
RSB [31]3 years ago
7 0
7*12=84
84/3 = 28

Answer = 28 people
Alborosie3 years ago
6 0

Answer: You would need 5 men to paint a room in 3 hours

YWW :)

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SOMEONE PLEASE HELP ASAP <br><br> I do not understand how to answer this and it’s very confusing.
IceJOKER [234]
I think it’s d please give me brainliest
7 0
3 years ago
What transformation(s) is taking place i’ll mark u the brainliest if u help
Ray Of Light [21]

Answer:

Reflection, Translation, and possibly Rotation

6 0
3 years ago
NEED HELP FAST! WILL GIVE POINTS AND BRAINIEST!!
icang [17]
W=15 no

W= 21 no

W= 1 Yes

If im right the question is just asking which variable is less than 15. 
so the only variable that is less than 15 is 1.
7 0
3 years ago
Read 2 more answers
A boat travels 12 km upstream and back in 1 hour 45 minutes. If the speed of the current is 3 km/h throughout, find the speed of
Elza [17]

Answer:

14.3 km/h   to 3 significant figures

Step-by-step explanation:

Let time travelling upstream be t1 hours and downstream = t2 hours.

t1 + t2 = 1.75..........................(1)

Let v  be the speed of the boat in still water.

12 / t1 = v - 3.........................(2)

12 /  t2 = v + 3........................(3)

From (1) and (3) , substituting for t2:-

12 / (1.75 - t1) = v + 3 ..................(4)

Subtract:-   (2) - (4):-

12 / t1 - 12 / (1.75 - t1) = -6

12(1 .75 - t1) - 12t1 = -6t1(1.75 -  t1)

21 - 12t1 - 12t1 = -10.5t1 + 6t^2

6t1^2 + 13.5t1 - 21 = 0

Solving this gives t1 = 1.058 hours

Therefore the speed in still water (v)  = 12/1.058 + 3 = 14.3 to 3 sig figs

3 0
3 years ago
Ummm i don’t understand these I just started can someone help
bixtya [17]

so for question 2 find the area of the rectangle first:

15 \times 19 = 285

then you find the area of the triangles:

15 \times 13 = 195 \\ 195 \div 2 = 97.5

15 \times 11 = 165 \\ 165 \div 2 = 82.5

Add up all the answers:

285 + 97.5 + 82.5 = 465

and for question 3, part A, you just find the area of the 2 boxes and multiply:

5 \times 5 = 25 \\ 25 \times 2 = 50

2 \times 5 = 10 \\ 10 \times 4 = 40

40 + 50 = 90

so the surface area of the box is 90 square inches therefore the paint covered 90 square inches. For part B, just add up the length of the thick black lines:

5 + 5 + 5 + 5 + 2 + 5 + 5 + 5 + 5 + 5 + 5 + 2 + 5 + 5 = 64

How these helped have a good day

8 0
3 years ago
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