3 years ago

Help please urgenttt

Mathematics

1 answer:

stiv31 [10]3 years ago

3 0

Answer:

its a

Step-by-step explanation:

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Sin^2x + sin2x +2cox^2x = 2

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The sum of 28 and 7 in expression form

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hope this helps

pls make me brainliest

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2 years ago

How do I solve this?

meriva

Hello,

If 3x-1>=0 then

x>=1/3
|3x-1\=3x-1
2*|3x-1|=18
2*(3x-1)=18
6x-2=18
6x=20
x=10/3

else
x<1/3
|3x-1|=-(3x-1)
2*|3x-1|=18
2(-(3x-1))=18
-6x+2=18
-6x=16
x=-8/3
endif

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3 years ago

A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of 1.3 w/(m·k), separates a basement at 18°c f

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<span>THE AREA OF THE ROOM IS :A=4*2.4=9.6 m^2
THICKNESS t=0.30 m
DIFFERENCE IN TEMPERATURE dT=18-6=12
q=kAdT/dx=kA*dT/t
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In 1 hour or 3600 sec
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1.8MJ OF HEAT FLOWS HTROUGH THE WALL IN ONE HOUR</span>

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