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oksano4ka [1.4K]
4 years ago
8

Evaluate algebraic expressions with a single variable Question Evaluate the following expression at x=−7. −x−5

Mathematics
2 answers:
bazaltina [42]4 years ago
6 0

Answer:

2

Step-by-step explanation:

When x = -7, -x - 5 = -(-7) - 5 = 7 - 5 = 2.

ExtremeBDS [4]4 years ago
6 0

Answer:

-12

Step-by-step explanation: <em>Since, -x= -7,   -7-5= -12( because seven is a negative integer and the equation states that -7 and 5 has to be subtracted, according to various expressions like -1-1 the answer is given that it is -2 if 7 had been a positive integer, then, 7-5=2 as when a positive and negative integer is subtracted, we give the answer either +ve or -ve influenced by the sign of the greater number) Sorry........ i just noticed that the qstn had mentioned x and not -x, but since it has to be fair in answering, i'll leave the answer as how it was...... once again sorry</em>

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lozanna [386]

Answer:

37.89051724=x

Step-by-step explanation:

We can use similar triangles and proportions to solve.  Put the same side of the small triangle over the large triangle.

MA         MB

------- = ----------

MN         MP

80.5 -35         x

------------- = ----------

70.5               96.6 -x

Simplifying

45.5             x

------------- = ----------

70.5               96.6 -x

Using cross products

45.5 (96.6-x) = 70.5x

Distribute

4395.3 - 45.5 x = 70.5x

Add 45.5x to each side

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Divide each side by 116

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6 0
3 years ago
Please do these no fake stuff please. Click in the paperclip to see problems. Thank you.
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Step-by-step explanation:

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5 0
4 years ago
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Answer:

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Step-by-step explanation:

We can write this as a ratio

x        9

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Using cross products

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Divide by 15

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7 0
3 years ago
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sergiy2304 [10]

Answer:

90

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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