Finish solving the system of equations –9.5x – 2.5y = –4.3 and 7x + 2.5y = 0.8 using the linear combination method. 1. Determine
which variable will be eliminated: y will be eliminated because –2.5y and 2.5y are opposite terms. 2. Add the equations together to create a one-variable linear equation: –2.5x = –3.5 3. Solve to determine the unknown variable in the equation: x = 1.4 4. Substitute the value of the variable into either original equation to solve for the other variable.
At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The statistician reported that the mean serve speed of a particular player was 95 miles per hour. Suppose that the statistician indicated that the serve speed distribution was skewed to the left. Which of the following values is most likely the value of the median serve speed? Explain your answer.
<span>10x + 30(2) = 20(x + 2) 10x + 60 = 20x + 40 10x = 20 answer x = 2 liters So you would need 2 liters of the 10% solution to make the 30% solution 20%.</span>
