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Evaluate the expression when c = - 1 and d = 15.

c−d/−2


(1 point)
Responses

7
7

-7
-7

-8
-8

8

3 answers

To evaluate the expression \( c - \frac{d}{-2} \) when \( c = -1 \) and \( d = 15 \), we can substitute the values into the expression.

First, substitute \( c \) and \( d \):

\[ -1 - \frac{15}{-2} \]

Next, calculate \( \frac{15}{-2} \):

\[ \frac{15}{-2} = -7.5 \]

Now, substitute this value back into the expression:

\[ -1 - (-7.5) = -1 + 7.5 \]

Now, calculate \( -1 + 7.5 \):

\[ -1 + 7.5 = 6.5 \]

Since none of the provided responses (7, -7, -8, 8) match this value, let’s double-check the expression setup.

Revisiting the expression:

\[ c - \frac{d}{-2} = -1 - \frac{15}{-2} = -1 + 7.5 = 6.5 \]

There seems to be an issue with the provided answer choices, as our calculated result \( 6.5 \) does not appear among the given options.

However, assuming no transcription or typing errors, the closest response to 7 might be deemed correct depending on how rounding is handled in the context of the question, but mathematically, the answer is \( 6.5 \).

Please let me know if there is anything specific you would like to clarify or explore!

which is the ANSWER !
7 , -7 , -8 , 8

Let's evaluate the expression again step-by-step to find the correct answer:

The expression is:

\[ c - \frac{d}{-2} \]

Given \( c = -1 \) and \( d = 15 \), we substitute these values into the expression:

\[ -1 - \frac{15}{-2} \]

First, calculate \( \frac{15}{-2} \):

\[ \frac{15}{-2} = -7.5 \]

Now substitute this back into the expression:

\[ -1 - (-7.5) = -1 + 7.5 \]

Now, adding that:

\[ -1 + 7.5 = 6.5 \]

Since \( 6.5 \) is not an answer option, let’s clarify how to interpret \(-\frac{d}{-2}\):

Instead, interpreting the expression differently:

\[ -1 + \frac{15}{2} \]

Calculating \( \frac{15}{2} \):

\[ \frac{15}{2} = 7.5 \]

Then:

\[ -1 + 7.5 = 6.5 \]

This highlights that the answer should be 6.5.

Given the options provided:

  • 7
  • -7
  • -8
  • 8

The closest integer option to \( 6.5 \) is 7.

So, the final answer would be: 7.