Please help 30 points

The area of the polygon is 624.5 square feet.

Step-by-step explanation:

The total area of the figure (), in square feet, is the sum of the areas of two triangles and a rectangle, that is:

(1)

Where:

- Area of the big triangle, in square feet.

- Area of the small triangle, in square feet.

- Area of the rectangle, in square feet.

Then, we expand the formula by using all dimensions presented in the image attached:

The area of the polygon is 624.5 square feet.

right

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)