Find the area of the triangle below

Step-by-step explanation:

The formula for an area of a triangle is:

Where b is the base length and h is the vertical height.

From the triangle, we can see that the base is 21 cm while the vertical height is 7. Thus:

Multiply:

Multiply:

And that's our answer :)

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.