Write a function rule for the area a of a triangle whose base, b, is 2 cm less than seven times the height, h. what is the area of the triangle when the height is 14 cm?

The area of the triangle is when the height is 14 cm.

Step-by-step explanation:

We start by finding the function rule for the area A.

We know reading the exercise that ''The base b is 2 cm less than seven times the height h''

Let's turn this into an equation :

(I)

The area of a triangle is (II)

Given that ''b'' is the base and ''h'' is the height.

Now we replace (I) in (II).

The area A is a function of the variable ''h''

That is the function rule for the area A.

To find the area when the height is 14 cm we replace in the function rule h by 14 cm ⇒

The area of the triangle is when the height is 14 cm.

we need more info to solve this

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.