Experts/ace plz me pl
what equation can you use to find the value of x?

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?