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algebra
Solve each equation by factoring. 7x²243=0 I know I'm supposed to add 243 to the other side but don't know what else to do. Divide maybe? Thanks in advance. 243+7x^2= 0 (reorder) 243+243+7x^2 = 0+243 (add 243 to both sides)
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A score of 243 is a "basic" reading level. Scores for a random sample of 3000 students had a xbar = 250 with a standard error 1.0 The 99% confidence interval for the mean score all students in the city is 247.4 to 252.6. Ques: Is
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