The length of a rectangle is twice as long as its width. The width is 104 inches, Find the perimeter of the rectangle

624

Step-by-step explanation:

the width is 104

if the length is doubled, that means the length is 208.

rectangles have 2 sets of equal sides

104 + 104 =208

208 + 208 = 416

416+208 = 624

624

Step-by-step explanation:

The width is 104. Now we need to find the length. 104 x 2 - 208. The length is 208. A rectangle has four sides, two of them are the length, and two of them are the width. To find the perimeter, we need to add all of them. 104 + 104 + 208 + 208 = 624.

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if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

step-by-step explanation:

659