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Answer the algebra questions?
-3x+9y=18; find the x and y intercept of the line
How do you solve -3x plus 9y equals 18?
First, you want to get the y on one side of the equation and everything else on the other side. To do this, add 3x to each side: 9y = 3x + 18 The next step is to divide both sides by 9, which gives you the equation solved for y: y = x/3 + 2
What is the slope of any line parallel to the line 3x plus 9y equals 5?
A linear equation in the form y = mx + c has slope m Any line parallel to 3x + 9y = 5 has the same slope 3x + 9y = 5 → 9y = -3x + 5 → y = (-3/9)x + 5/9 → y = -⅓x + 5/9 → Every line parallel to 3x + 9y = 5 has slope -⅓.
The sum of the digits of a two-digit number is 16 If the digits are reversed the new number is 18 less than the original number Find the original number?
x + y = 16 so x = 16 - y 10y + x = 10x + y - 18 9y = 9x - 18 ie 9y = 144 - 9y - 18 ie 18y = 126: y = 7 so original number was 79
Solve the system using elimination 3x -9y equals 3?
Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.
