The concentration, in parts per million, of an antibiotic in a human’s bloodstream after x minutes can be modeled by the equation f(x) = 6x 0.02x2 + 5.2 . what is the maximum amount of the antibiotic in the bloodstream?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Question 3 (essay worth 10 points) (03.06 mc) part a: max rented a motorbike at $465 for 5 days. if he rents the same motorbike for a week, he has to pay a total rent of $625. write an equation in the standard form to represent the total rent (y) that max has to pay for renting the motorbike for x days. (4 points) part b: write the equation obtained in part a using function notation. (2 points) part c: describe the steps to graph the equation obtained above on the coordinate axes. mention the labels on the axes and the intervals. (4 points)

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.