Abcd is a trapezoid with ad = 5 ft, dc = 7 ft, and ab = 15 ft. find the area of the trapezoid. 30 ft2 33 ft2 44 ft2 55 ft2

33 ft².

Step-by-step explanation:

1. As you can see in the figure attached, the trapezoid is formed by a rectangle and two equal right triangles. The base of each triangle is 4 feet and you know the lenght of the hypotenuse AD, therefore, you can calculate the height by applying the Pythagorean Theorem:

2. Now, you can calculate the area with the following formula:

Where B is the longer base, b is the shorter base and h is the height.

Then:

D.

Step-by-step explanation:

The area of the trap-ezoid ABCD is given by the formula,

See diagram in the attachment.

We substitute the given values to obtain;

This simplifies to

This will give us;

Therefore the correct answer is option D.

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option