The quadratic function f (x) = - 45x2 + 350x + 1,590 models the population of a city where x represents the number of years since 2005 and f (x) is the population of the city in thousands of people. What is the estimated population of the city in 2010?

Mr. walker gave his class the function f(x) = (x + 3)(x + 5). four students made a claim about the function. each student’s claim is below. jeremiah: the y-intercept is at (15, 0). lindsay: the x-intercepts are at (–3, 0) and (5, 0). stephen: the vertex is at (–4, –1). alexis: the midpoint between the x-intercepts is at (4, 0). which student’s claim about the function is correct?

10% of 1,900,000. show me how you got the answer

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.