Mathematics, 19.07.2020 01:01 eden1017
3. Given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solution. Show why this is true by solving the system of equations given. Justify the reason for each step. HINT: Use addition property of equality and multiplication property of equality in your answers. (8 points: 1 point for each question) 5x + 2y = 7 3x – y = 2 To solve the system using elimination, first multiply the bottom equation by 2. Write the new system of equations. (1 point) Why is this multiplication allowed? (1 point) What variable will be eliminated when the equations are combined after the multiplication? (1 point) Next, add the equations together. Your answer should be a single equation with one variable. (1 point) Why can you add the equations? (1 point) Solve the equation for x. (1 point) Substitute x back into one of the equations to solve for y. (1 point) What is the solution to the system of equations? (1 point)
Answers: 3
Mathematics, 21.06.2019 19:00, ashrobbb
The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean
Answers: 3
3. Given a system of two equations in two variables, replacing one equation by the sum of that equat...
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