Answer: Each design costs 5 dollars. I would choose design 2 because its bigger.
This is a problem of Difference-of-squares. We know that for a difference of squares

the factorization is given by:

To learn this you need to remember that a <em>difference</em> means <em>subtraction.</em> So applying those concepts we can solve this problem step by step.
Applying distributive property:

Applying distributive property again:

Simplifying:
<em>The correct answer is C</em>
Answer:
980 hers your proof so 170 * 7 =180
Step-by-step explanation:
36. The seamstress can cut 36 15-inch pieces of ribbon from 5 rolls of 9ft ribbon.