Answer:
-24xy+ 162x²y +168xy²
Step-by-step explanation:
[4-7(3x+4y)] • 3x(-2y) =
(4-21x-28y) • (-6xy)=
4•(-6xy) -21x•(-6xy)-28y•(-6xy)=
-24xy+ 162x²y +168xy²
Answer:
32 cubic meter
Step-by-step explanation:
Volume for any pyramid is given by following expression
volume of pyramid = 1/3( area of base of pyramid * height of pyramid)
________________________________
In the problem
base area of pyramid = 24 sq. m
height = 4 m
Therefore substituting the above given value in formula for volume of pyramid we have
volume of pyramid = 1/3( 24 sq. m * 4 m) = 8 sq. m * 4 m (since 24/3 = 8)
volume of pyramid = 32 cubic meter.
Answer:
The answer to your question is: 21
Step-by-step explanation:
Data
AB = BC = CD
BQ = 21
QD = ?
PC = 11
Process
Here there are 2 triangles
ΔQCB and ΔQCD
These triangles share one side QC
And one side measures the same BC = CD
And the ∠ BCQ = ∠ DCQ
Then these triangles are congruents SAS
if QB = 21 then QD = 21
Given: Sound Intensity ( I ) = 
We know, the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is 
⁻¹² W/m².
So, we can say, Reference sound intensity
= 10⁻¹² W/m².
We have formula for "sound intensity level LI in dB" when entering sound intensity.
LI = 10×log (I / Io) in dB
Plugging values of I and Io in formula.
LI = 10 × log (
)
LI = 10 × log (99000000)
= 10 × 7.99564
LI = 79.96 dB.
Therefore, 79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.
Answer:
☆ y=kx
Example: if we have x= 3 and y= 15
Find y?
y= kx
*We know that y= 15 and x= 3
So,
15=k(3)
15=3k
*divide 3 from both sides
K=5
y=5x
y=5(5)=25
☆▪☆▪☆▪☆▪☆
Hope it helps..
Have a great day!!
