Q. How many solutions does the system have?{y=−2x−4y=3x+3Choose 1 answer:(A) Exactly one solution(B) No solutions(C) Infinitely many solutions
Write Equations: Write down the system of equations.We have the following system of equations:y=−2x−4y=3x+3
Set Equal: Since both equations are equal to y, set them equal to each other to find the point of intersection.−2x−4=3x+3
Solve for x: Solve for x by adding 2x to both sides and adding 4 to both sides.−2x+2x−4+4=3x+2x+3+40x=5x+7
Simplify Equation: Simplify the equation. 0=5x+7
Isolate x: Subtract 7 from both sides to isolate the x-term.−7=5x
Divide by 5: Divide both sides by 5 to solve for x.x=−57
Substitute x: Substitute x back into one of the original equations to solve for y. Using y=−2x−4: y=−2(−57)−4
Multiply and Subtract: Multiply −2 by −57 and subtract 4. y=514−4
Combine Fractions: Convert 4 to a fraction with a denominator of 5 to combine with 514. y=514−520
Final Solution: Subtract the fractions.y = (14−20)/5y = −6/5
Final Solution: Subtract the fractions.y = (14−20)/5y = −6/5We have found a single solution for the system of equations: (x,y)=(−7/5,−6/5).This means the system has exactly one solution where the two lines intersect at one point.