Answer:
No. 5 - x =2. y = -4
No. 6 - y = 15. x = 26
No. 8 - Solutions (-3, -3) (-3, -4)
Not Solutions (0,0) (1,0
Step-by-step explanation:
No. 5 - When solving a system of equations the goal is to eliminate one of the variables (x or y) so that you can solve for the other.
- For this problem you can subtract one equation by another because both of the equations have 2x in them, so when you subtract them you eliminate x.
- Now you solve for y which gives you
y = -4
- Now plug in -4 for y in either of the two equations to solve for x and you then have both solutions
No. 6 - First you must multiply one of the equations to make it have the same number in front of either x or y ( I chose x)
- Then repeat the same process as number 5, 1. subtract, 2. solve for y, 3. plug in y to one of the other equations tosolve for x
No. 8 - start by graphing the lines as if the greater than/less than symbols are equal signs
- If the sign has the line under it ("or equal to") then draw the graph as a solid line. If it does not have the line under it drw the graph dashed. If it is solid, points on that line are solutions, if it is dashed points on the line are not solutions
- Since it is a system the solutions must be points that follow the rules of both inequalities. The shaded area on the graph I drew is the area where points are solutions.
- To figure out which side of the graph is the side with the solutions plug in a coordinate pair from that side, if the resulting statement is true, then that side has the solutions on it
I hope this helps sorry it took so long there's a lot here I hope it's not too confusing
