Question

can someone please help me with this math question? Please? I'll fan and give a medal!!
Question -
Answer the following question, indicating in words each step that is used.
- A football field’s dimensions are represented by a width of (3x + 10) feet and a length of (7x + 10) feet. Find an expression for the area A of the football field. Give your answer as a quadratic trinomial.

Answer 1

Double distribute. (3x+10)(7x+10) Multiply 3x by both terms in the second polynomial. So you get 21x^2 and 30x. Then take the 10 and multiply the it by the 7x and 10. Giving you 70x and 100. Combine like terms, you get 21x^2 +100x +100.Hope this helps.

Answer 2

This helps a lot!! thank you! I have to copy this down on Word, would you mind checking to make sure I copied them down right?

Answer 3

@mccarthym372390 here is how I wrote it down -
(3x+10)(7x+10)
3x*7x=21x
3x*10=30x
10*7x=70x
10*10=100
21x^2+100x+100

Answer 4

21x^2

Answer 5

Also suggest writing it 3x*7x+3x*10 +7x*10+10*10. Unless you want to break it down.

Answer 6

oh ok so
(3x+10)(7x+10)
3x*7x+3x*10 +10*7x+10*10
21x^2+30x+70x +100

Answer 7

Yup!

Answer 8

great thank you so much!! :)