Correct answer only ! which polynomial represents the area of the rectangle?

Formula for Area:

We take the length and multiply it by the width:

We then need to foil. Multiply everything in the left expression by the right expression.

Combine like terms:

Your answer would be:

B

Let's start by looking at a rectangle with length 3x and width x + 1. I've broken the width into two chunks - the x chunk and the 1 chunk. If we look at the area of the two smaller rectangles, we can see that their areas are 3xx = 3x² and 3x(1) = 3x, making the total area so far 3x² + 3x. (Picture 1)

Now, to turn this rectangle into the one in the problem, we need to subtract 5 from the length. This has the effect of subtracting two smaller rectangles with areas 5x and 5 (picture 2), making our total area now 3x² + 3x - 5x - 5 (picture 3). Simplifying our expression, we find that the area of the rectangle in the problem is 3x² - 2x - 5 (picture 4)

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step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )