Please can someone help me i dont know how to do this

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  B, D = yes; others = no

Step-by-step explanation:

Recognize that "at most" means "less than or equal to." Sarah's spending must satisfy ...

  3.50 + a ≤ 9.00

Subtracting 3.50 from both sides gives ...

  a ≤ 5.50 . . . . . . . . . matches the second inequality shown

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The graph of this will be shaded to the left, where 'a' values are less than the limit. The graph will have a solid dot at 5.50, where a = 5.50 is an allowed solution. This description matches the first number line shown.

_____

Point of clarification

We have used a red X to indicate that the corresponding inequality or graph is not an appropriate choice. It does not mean that the "NO" answer is incorrect. Rather, it means the answer is "NO."

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

step-by-step explanation: