A newspaper wants to predict the outcome of an election by estimating the proportion of voters who support the construction of a mall in Elk Grove. A previous survey done earlier in the year found that 67% of voters support the construction of the mall. What sample size is needed if the newspaper wants the estimate to be within 3% with 99% confidence?

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14