In tennis, gabby serves an ace, a ball that can't be returned, 4 out of the 10 times she serves. what is the experimental probability that gabby will serve an ace in the first match of the next game? make a prediction about how many aces gabby will have for the next 40 serves. justify your reasoning.

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?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students