Mutiply the polynomial (x - 6)(x^2 + 2x - 4)

the answer is x^3+4x^2-16x+24

x^3 − 4x^2 − 16x + 24

Step-by-step explanation:

(x − 6) (x^2 + 2x − 4)

= (x + −6) (x^2 + 2x + −4)

=(x) (x^2) + (x)( 2x) + (x) (−4) + (−6)  (x^2) + (−6) (2x) + (−6) (−4)

=x^3 + 2x^2 − 4x − 6x^2 − 12x + 24

=x^3 − 4x^2 − 16x + 24

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.

answer: ratio of volume of cone (with 3 times the height and equal diameter) to volume of cylinder is 2 to 1. the value of π is not used.

step-by-step explanation:

radius is diameter/2 = 4.

area of circle is π r^2.

volume of cylinder is height × area of base = hπr^2 = 3(4^2) π = 48π cubic inches.

not knowing the formula for volume of cone, i calculate it using calculus (which is for calculating things).

volume of cone is integral 0 to h area(y) dy. area(y) is π r(y)^2. r(y) runs r to zero as y runs zero to h, r(0) = r, r(h) = 0.

r(y) = r - r/h y

area(y) = π (r - r/h y)^2 = π (r^2 - 2r^2y/h + r^2y^2/h^2) = π r^2(1-2y/h+y^2/h^2)

antiderivative area(y) = π r^2 (y-y^2/h+y^3/(3h^2))

integral 0 to h = π r^2(h-h^2/h+h^3/(3h^2) - (0)) = π r^2(h - h + h/3) = π r^2(h/3) = π/3 r^2 h

volume of this cone is π/3(4^2)18 cubic inches.

= 6 16 π = 96π cubic inches.

cone has twice the volume, 96/48.

cone height is 6 times the cylinder.

ratio of volume formula: π r^2 cancels.

cone over cylinder ratio is 6h/3 to h, 2 to 1.