Robert wants to purchase a skateboard for $109.98. He will also have to pay a 6.5% sales tax, a) How much did he pay in tax?

b) What is the total cost of the skateboard?

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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.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

How to simply and write the answer n a whole number