1.A head teacher wants to know whether performance in year 7 maths exams predicts GSCE (year 11) maths results. They have data on year 7 summer exams in maths, English and science, and GCSE (year 11) results in maths and English for a total of 460 students. What is the IV? A. Year 7 maths exam performance
B. GCSE Maths exam performance
C. Year 7 English exam performance
D. Year 7 exam performance across maths, English and science

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is