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2 + 2 = ?

Which of the following would represent the sum of 3 consecutive integers if x is the first integer?

Use the multiplier method to incrases £258 by 43%

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9