P=2(L+W)
60=P=2(L+W)
60=2(L+W)
divide by 2
30=L+W
given
W=-2+7L
subsitute
30=L+W
30=L-2+7L
30=8L-2
add 2
32=8L
divide by 8
4=L
sub back
W=-2+7L
W=-2+7(4)
W=-2+28
W=26
width is 26cm
length is 4cm
Answer:
I think it is 8! Sorry if it's wrong!
First note the intersections of each pair of lines.
x = 3 ⇒ y = 2•3 + 1 = 7 ⇒ (3, 7)
y = -3 ⇒ -3 = 2x + 1 ⇒ x = -2 ⇒ (-2, -3)
y = -3 and x = 3 ⇒ (3, -3)
Using the disk method, we consider disks with thickness ∆y and radius equal to the horizontal distance between the line y = 2x + 1 (or x = (y - 1)/2) and the axis of revolution, x = 3. Each disk will then contribute a volume of
∆V = π (radius)² (thickness) = π/4 (y - 1)² ∆y
As we let ∆y go to zero and let the number of disks go to infinity, the total volume of the resulting cone will be given by the integral
As long as they have the same number of sides, no. The outcome of the first roll does not affect the outcome of the second roll in any way for this situation.
10*4 = 40
remeber: 75% is 3/4
so if you dont understand why we multiply by 4, just comment