Find the missing b for a trapezoid with a=68, h=4, b=21

We will have to use the formula for the area of a trapezoid on this problem, which is ( and are the bases of the trapezoid and is the height):

All we need to do is substitute the information we are given into our formula:

Now, let's just simplify the equation:

The missing base has a length of 13 units.

just keep asking questions until you have a better understanding.

step-by-step explanation:

x coordinate can be written by using the formula, x= x1 + 2/5(x2 - x1)

step-by-step explanation:

formula

x = x1 + p/w(x2 - x1)

let the line segment ab with a(x1,y1) and b(x2,y2)

a point(x,y) divide ab in the ratio, 2: 3 the x coordinate can be written as

x = x1 + p/w(x2 - x1)

here p=2 and w = 2+3

therefore,

x coordinate can be written by using the formula, x= x1 + 2/5(x2 - x1)

similarly y coordinate y = y1 + 2/5(y2 - y1)