An online movie site offers a 4 year plan that charges $175 for the first year. After the first year, the rates increase by 20% each year. Write an explicit formula that represents the total amount of dollars, an, that a customer would have paid after n years. Your

an = 175(1 + 20)n

an = 4.2n + 175

an = 175(1.2)n-1

an = 1.2(an-1)

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?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Two triangles can be formed with the given information. use the law of sines to solve the triangles. b = 49°, a = 16, b = 14