Can someone with this one question

Which expression is equivalent to 2x^2+7x+4?

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate. in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be