Two data sets have different variances. A constant of k units is added to all the numbers in both data sets. What is the effect on their new variances

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827