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How many solutions does the system have?

{[y=-2x-4],[y=3x+3]:}
Choose 1 answer:
(A) Exactly one solution
(B) No solutions
C) Infinitely many solutions

How many solutions does the system have?{y=2x4 y=3x+3\begin{cases} y = -2x - 4 \newline\ y = 3x + 3 \end{cases}Choose 11 answer:\newline(A) (A) Exactly one solution\newline(B) (B) No solutions\newline(C) (C) Infinitely many solutions

Full solution

Q. How many solutions does the system have?{y=2x4 y=3x+3\begin{cases} y = -2x - 4 \newline\ y = 3x + 3 \end{cases}Choose 11 answer:\newline(A) (A) Exactly one solution\newline(B) (B) No solutions\newline(C) (C) Infinitely many solutions
  1. Write Equations: Write down the system of equations.\newlineWe have the following system of equations:\newliney=2x4y = -2x - 4\newliney=3x+3y = 3x + 3
  2. Set Equal: Since both equations are equal to yy, set them equal to each other to find the point of intersection.2x4=3x+3-2x - 4 = 3x + 3
  3. Solve for x: Solve for x by adding 2x2x to both sides and adding 44 to both sides.\newline2x+2x4+4=3x+2x+3+4-2x + 2x - 4 + 4 = 3x + 2x + 3 + 4\newline0x=5x+70x = 5x + 7
  4. Simplify Equation: Simplify the equation. 0=5x+70 = 5x + 7
  5. Isolate xx: Subtract 77 from both sides to isolate the xx-term.\newline7=5x-7 = 5x
  6. Divide by 55: Divide both sides by 55 to solve for xx.x=75x = -\frac{7}{5}
  7. Substitute xx: Substitute xx back into one of the original equations to solve for yy. Using y=2x4y = -2x - 4: y=2(75)4y = -2(-\frac{7}{5}) - 4
  8. Multiply and Subtract: Multiply 2-2 by 75-\frac{7}{5} and subtract 44. \newliney=1454y = \frac{14}{5} - 4
  9. Combine Fractions: Convert 44 to a fraction with a denominator of 55 to combine with 145\frac{14}{5}. \newliney=145205y = \frac{14}{5} - \frac{20}{5}
  10. Final Solution: Subtract the fractions.\newliney = (1420)/5(14 - 20)/5\newliney = 6/5-6/5
  11. Final Solution: Subtract the fractions.\newliney = (1420)/5(14 - 20)/5\newliney = 6/5-6/5We have found a single solution for the system of equations: (x,y)=(7/5,6/5)(x, y) = (-7/5, -6/5).\newlineThis means the system has exactly one solution where the two lines intersect at one point.