The area of a given trapezoid is 86cm. base 1 is 12cm and the height is 8cm. what is the length of base 2. the formula for a trapezoid is a=1/2(b1+b2)h

Here is the formula:

The first thing you need to do to solve this question is see the information you are given.

You are given:

Now that you know what information is given, you need to plug it into the formula.

Replace the variables used in the formula with the values you are given.

Now you need to do multiply everything in order to 'simpify it'. I'm goinf to change b1 into x; x is the value of b1.

Multiply everything in the parentheses, but first start with the first one(parenthesis).

You need to have only 1 number/variable on each side. That means you have to multiply the values in the two parentheses:

Here is your new equation:

In order to get the answer, you need to find the value of x alone, meaning you need to remove everything next to it.

In this equation, 4x is added with 48. That means you need tog et rid of +48 by moving to the other side, which can also be done by adding it with it's opposite. The opposite of +48(positive 48) is -48(negative 48). In order to remove it, subtract 48 from both sides.

Now you're left with 4x=38

Remember that you're trying to find x alone. That means you need to the opposite of what's happening to it.

In this question, x is being multiplied by 4. The opposite of it is dividing by 4.

Divide both sides by 4:

The value of Base 2 is 9.5 cm

Maybe 3.18

Step-by-step explanation: