For what value of B is x=4 a solution to Bx+3=x-9

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry