A repairman says the cost in dollars to hire his services for x hours is 20(3 + 4x). a. How much would it cost to hire him for 1 hour? b. Expand the expression he has given you. c Hence, state: i his call-out fee ii the amount he charges per hour.

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

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