Answer:
First get the formula for your pattern in the form of TN. Where d represents your difference and a represents your first term. Then equate the -401 to your formula and solve for n
The area of a rectangle is L x W, so 9(5+x) is the formula for the area in factored form. It can be simplified to 45+9x
If you don’t your answer will not be correct also when you use them it helps you find the correct answer
Answer:
simplify: 14/40
not simplify: 7/20
I don't know if it's right but i'm trying to help :)