To determine when -8 is a solution, you will replace each variable with -8 and see which statements are true.
A. x + 4, -8 + 4<span> = -4, this is not in between 0 and 1 </span>B. x - 3, -8 - 3 = -11, not between -5 and 2 C. 8x + 7, 8(-8) + 7 = -57 is not between -1 and 1 D. 3x, 3(-8) = -24 is equal to -24, so this one is true
A. <span>5x, 5(-6) = -30 is not less than -35 or greater than 35 </span>B. 3x - 2, 3(-6) - 2 = -20 is not between -5 and 1 C. 3x + 5, 3(-6) + 5 = -13 is between -16 and 11 D. x - 5, -6 - 5 = -11 is not between -8 and 3
Answer: Tammy's sample may not be vaild because she surveyed the students only from her class and it is likely that other classes might not like the subject maths. She might get the accurate results by surveying a larger number of people in the school instead of just her class.
