MATH SOLVE

4 months ago

Q:
# Question 1(Multiple Choice Worth 5 points)(8.01 LC)Two lines, A and B, are represented by the equations given below:Line A: x + y = 2Line B: 2x + y = 4Which statement is true about the solution to the set of equations? There are infinitely many solutions. There are two solutions. There is one solution. There is no solution.Question 7(Multiple Choice Worth 5 points)(8.02 MC)Which of the following graphs shows a pair of lines that represent the equations with a solution (β5, 2)? A coordinate grid is shown from negative 8 to positive 8 on the x axis and also on the y axis. A pair of lines is shown intersecting on ordered pair 2 units to the right and 5 units down. A coordinate grid is shown from negative 8 to positive 8 on the x axis and also on the y axis. A pair of lines is shown intersecting on ordered pair 5 units to the right and 2 units down. A coordinate grid is shown from negative 8 to positive 8 on the x axis and also on the y axis. A pair of lines is shown intersecting on ordered pair 5 units to the left and 2 units up. A coordinate grid is shown from negative 8 to positive 8 on the x axis and also on the y axis. A pair of lines is shown intersecting on ordered pair 2 units to the left and 5 units up.

Accepted Solution

A:

Question 1:Substitution.x+y=2y=-x+22x+(-x+2)=4x=2(2)+y=2y=0Solution: (2,0)There is one solutionQuestion 7 is too confusing, just find where the points intersect at (-5,2).Question 9:Elimination.(-1)y=2x+6y=2x+2New: -y=-2x-60=-4No SolutionQuestion 11:Just look at explanations.It's (5,17) both lines etc..