The volume of a pyramid is found by multiplying the length, width and height together then dividing by 3.
length x width x height = 12 x 12 x 12 = 1728
volume = 1728 / 3 = 576 cubic cm
Shoes= 10
Man= 5
Tie= 4
So, 10+5*4= 30 <— Answer
How to get variables:
Shoes:
3 shoes are equal to 30, so to find the value of the shoes use 3x=30. X=10
Man:
2 men and a shoe is equal to 20. So, 2x+10=20
2x=10
X=5
Tie:
2 ties and a man are 13. So,
2x+5=13
2x=8
X=4
= 3 - 3cos x - 2(1- cos^2 x)
= 2cos^2 x - 3cos x + 1
=(cos x -1)(cosx - 1/2)
now cos x = 1 or cos x= 1/2
draw a graph we get = + ve values
hence .. 0 ,180,360 and 60,240, degrees in range x<2pi
Multiply the first bracket by -4
Multiply the second bracket by 3
-4(2x - 5) = 3(x - 15)
-4(2x)-4(-5)= 3(x)+3(-15)
-8x+20= 3x-45
Move 3x to the other side. Sign changes from +3x to -3x.
-8x-3x+20= 3x-3x-45
-11x+20= -45
Move +20 to the other side. Sign changes from +20 to -20.
-11x+20-20= -45-20
-11x= -65
Divide by -11
-11/-11x= -65/-11
x= 65/11 or x= 5 10/11
Answer: x= 65/11 or x= 5 10/11
