Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the inverse doesn't exist. 3x + 6y = -3 2x - 2y = -14
A. x = 2, y = -5
B. x = -5, y = 2
C. No inverse, no solution for system
D. x = -5, y = -2
Answer: B
You might also like to view...
Solve the initial value problem.y'(x) = 8 sec2 2x, y(0) = 2
A. y = 4 tan 2x + 1 B. y = 4 tan 2x - 2 C. y = 4 tan 2x + 2 D. y = 8 tan 2x + 2
Decide on the payoff in this game when the specified strategy is used.(1, 1)
A. $5 from A to B B. No payoff C. $2 from A to B D. $5 from B to A
Use Bayes' rule to find the indicated probability.A survey conducted in one U.S. city together with information from the census bureau yielded the following table. The first two columns give a percentage distribution of adults in the city by ethnic group. The third column gives the percentage of people in each ethnic group who have health insurance. Ethnic GroupPercentage Percentage with of adults health insuranceCaucasian43.2?79African American12.7?49Hispanic17.5?57Asian10.8?61Other184.2?51An adult is selected at random from the city. Determine the probability that the adult obtained is Asian given that he or she has health insurance.
A. 0.61 B. 0.066 C. 0.001 D. 0.108
Use a graphing utility to solve the system of equations. Express the solution rounded to two decimal places.
A. x = 1.99, y = 0.13; x = 1.04, y = 1.70; x = -0.91, y = 2.95 B. x = 1.18, y = 1.03; x = 1.07, y = 1.52; x = -0.91, y = 2.88 C. no solution D. x = 1.81, y = 0.28; x = 0.20, y = 2.45; x = -0.20, y = -2.45