2015年8月31日 · Anyway, I mean the row that starts 1, 7... Each number is formed by adding the two numbers above to the left and right. The last row gives us the coefficients we need: (x+y)^7 = x^7+7x^6y+21x^5y^2+35x^4y^3+35x^3y^4+21x^2y^5+7xy^6+y^7

2015年11月30日 · Convert the equation to slope-intercept form. Determine two points. Plot the points and draw a straight line through the points. Rearrange the equation to slope-intercept form, y=mx+b, where m is the slope and b is the y-intercept. x-y=7 Subtract x from both sides. -y=-x+7 Multiply both sides by -1. y=x-7 Since this is a linear equation, only two points are needed. …

The x-intercept is where the line intersects the x-axis. this means y = 0. Plug in y = 0 into y=x+7 and it will give you: 0 = x + 7 = Plugged in 0 for y) 0 - 7 = x + 7 - 7 = Subtract 7 to both sides-7 = x or x = -7 =Simplify So the x intercept is -7, which means the x-intercept coordinate is (-7,0). So plot coordinate (-7,0) on the graph. With ...

2018年8月3日 · Slope: -1 x-intercept: (-7, 0) y-intercept: (0, -7) y = -x - 7 This equation is in slope-intercept form: Based on the image, we know that the slope is the value multiplied by x, so the slope is -1. We know the y-intercept is b, or -7, so it is at (0, -7). To find the x-intercept, plug in 0 for y and solve for x: 0 = -x - 7 7 = -x x = -7 The x ...

2015年10月20日 · The slope is 1 and the y-intercept is 7. x-y=-7 is in the standard form for a linear equation. The slope intercept form is y=mx+b, where m is the slope and b is the y-intercept. In order to convert from standard to slope intercept form, solve the standard form for y. x-y=-7 Subtract x from both sides. -y=-7-x Multiply both sides times -1. y=7+x Rearrange. y=x+7 The …

2017年4月24日 · graph{-x + 7 [-10, 10, -5, 5]} This is what your graph should look like. Just make sure to extend the y-axis further up to show the y-intercept. The "+7" indicates that there will be a y-intercept at 7. Therefore, you can plot a point at (0,7). Next, go 1 unit down and one to the right from the point you have just plotted. Mark this with ...

taking x+y=19 to be eqtn I and x-y=-7 to be eqtn II if x and y have coefficients, you will have to choose from the two unknown x and y, which one to eliminate first by using the coefficient in either eqtn I or eqtn II to multiple all through what's on eqtn II and same to eqtn I respectively.

You can put this solution on YOUR website! x+y=19 x-y=-7 add.-----2x=12 x=12/2 x=6 ans. 6+y=19 y=19-6 y=13 ans.

In order to do that, we need to have both x coefficients that are equal but have opposite signs (for instance 2 and -2 are equal but have opposite signs). This way they will add to zero. So to make the x coefficients equal but opposite, we need to multiply both x coefficients by some number to get them to an equal number.

You can put this solution on YOUR website! QUESTION: Solve the system by substitution. 3x - y = -7 x + y = -9 ...