CONTINUED For use after Chapter 7 Solve the equation. Check for extraneous solutions. 20. 3/2x = 4 21. 3x = Vx+6 22. vx2 + x - 3=3 Polar Bears In Exercises 23-25, suppose a scientific team gathered the weights (in pounds) of ten polar bears. The weights are 964, 1002, 1026, 978, 1078, 925, 928, 1005, 964, and 894. 23. Find the mean, median, mode, range, and standard deviation of the weights. hade uns no 24. Draw a box-and-whisker plot of the weights. 25. Make a frequency distribution using four intervals beginning with 875 - 929. Then draw a histogram of the data set