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heres the question Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 2-x and y = 4x + 3 intersect are the solutions of the equation 2-x = 4x + 3. (4 points) Part B: Make tables to find the solution to 2-x = 4x + 3. Take the integer values of x only between -3 and 3. (4 points) Part C: How can you solve the equation 2-x = 4x + 3 graphically? (2 points)
Anyone know how to solve?
both 2-x and 4x - 3 are equal to y therefore 2 - x = 4x - 3 (by The Transitive Property of Equality.)
Thats for A?
Once this is done i will give you a medal, but in new so i need to learn how to give one
thats A done yes
Oh thats not all the answer. The point of intersection is the solution because at that point the values of x and y satisfy both equations
table will look like |dw:1438980401594:dw|
you find the values by substituting the number for x in the expression for example for x = -2 it is 2 - x = 2-(-2) = 2+2 = 4 for x = -2 it is 4x - 3 = 4(-2) - 3 = -8 - 3 = -11
so you can continue to compute values for x = 1,2 and 3
was that last one for c?
I dont understand any of this problem.
that table was for part B
for Part C you can plot points on graph paper form x = -3 and x = 3 using the values form the table where the 2 lines cut is the solution
Thank you sooo much, I researched how to do this and found nothing. Your a lifesaver. I will give you a medal if you tell me how to.
click on the blue rectangle marked Best Response ( in one of my posts)
i only see the "become a fan" box, its blue