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How many solutions does the system of equations below have?\newliney=3x10y = 3x - 10\newliney=910x45y = \frac{9}{10}x - \frac{4}{5}\newlineChoices:\newline(A)no solution\newline(B)one solution\newline(C)infinitely many solutions

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Q. How many solutions does the system of equations below have?\newliney=3x10y = 3x - 10\newliney=910x45y = \frac{9}{10}x - \frac{4}{5}\newlineChoices:\newline(A)no solution\newline(B)one solution\newline(C)infinitely many solutions
  1. Analyze Equations: Analyze the given system of linear equations to determine if they are the same line, parallel lines, or intersecting lines.\newlineThe first equation is y=3x10y = 3x − 10 and the second equation is y=910x45y = \frac{9}{10}x − \frac{4}{5}. We can compare the slopes and y-intercepts of these two equations to determine the relationship between the lines they represent.\newlineThe slope of the first equation is 33, and the y-intercept is 10-10.\newlineThe slope of the second equation is 910\frac{9}{10}, and the y-intercept is 45-\frac{4}{5}.\newlineSince the slopes are different (39103 \neq \frac{9}{10}), the lines are not parallel and they are not the same line. Therefore, they must intersect at exactly one point.
  2. Compare Slopes and Intercepts: Solve the system of equations algebraically to find the point of intersection, which will confirm the number of solutions.\newlineWe can set the two equations equal to each other since they both equal yy:\newline3x10=910x453x − 10 = \frac{9}{10}x − \frac{4}{5}\newlineTo solve for xx, we can multiply both sides of the equation by 1010 to eliminate the fractions:\newline10(3x10)=10(910x45)10(3x − 10) = 10(\frac{9}{10}x − \frac{4}{5})\newline30x100=9x830x − 100 = 9x − 8\newlineNow, we can subtract 9x9x from both sides to get:\newline30x9x100=830x − 9x − 100 = −8\newline21x100=821x − 100 = −8\newlineNext, we add 100100 to both sides to isolate the term with xx:\newline3x10=910x453x − 10 = \frac{9}{10}x − \frac{4}{5}11\newlineFinally, we divide both sides by 3x10=910x453x − 10 = \frac{9}{10}x − \frac{4}{5}22 to solve for xx:\newline3x10=910x453x − 10 = \frac{9}{10}x − \frac{4}{5}44\newlineSince we found a unique solution for xx, and we can substitute this back into either of the original equations to find the corresponding yy value, this confirms that there is exactly one solution to the system of equations.

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