In 2x + 3, what is the variable?, 3, x, 2, In 2x + 3, what is the coefficient of x?, 3, x, 2, In 2x + 3, what is the constant term?, 3, 2, x, Evaluate 2x + 3 when x = 4., 11, 14, 9, In x − 3y + 2, how many variables are there?, 3, 2, 1, In x − 3y + 2, what is the coefficient of y?, −3, 2, 3, In x − 3y + 2, what is the coefficient of x?, −1, 1, 0, Sound travels at about 340 m/s in the book. For a delay of t seconds, which expression estimates the distance to fireworks?, 340 + t metres, 340/t metres, 340t metres, Using C = (5F − 160)/9, convert F = 50°F to Celsius., 10°C, 50°C, 90°C, At which temperature are the Fahrenheit and Celsius readings equal?, 0, 40, −40

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