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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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I need help right now please.
stealth61 [152]

Answer:

b. 5/√21

Step-by-step explanation:

The sine is positive in quadrant II, so the cosecant will be also. The sine function never has a magnitude greater than 1, so the cosecant function (the reciprocal of the sine) never has a magnitude less than 1.

The only positive number with a magnitude greater than 1 among your answer choices is 5/√21, selection B.

_____

If you draw the triangle with hypotenuse 5 and side 2 along the x-axis, you find the Pythagorean theorem tells you the opposite side (parallel to the y-axis) has length ...

... O = √(5² -2²) = √21

Then the sine ratio is ...

... Sin = Opposite/Hypotenuse = (√21)/5

The cosecant function is the reciprocal of the sine function, so its value is ...

... csc(θ) = 1/sin(θ) = 1/((√21)/5)

... csc(θ) = 5/√21

4 0
4 years ago
Thx for helping if u do
maw [93]

\frac{2}{3}  \div  \frac{1}{8}  =  \frac{2}{3}  \times 8 = 5.33
After rounding off, Answer is 6.

Hope this helps. - M
8 0
3 years ago
50 points!!!
fenix001 [56]

Answer: A

Step-by-step explanation: once you line the numbers up in order from least the greatest, the two middle numbers will be 12. Add 12 + 12 and you get 24. Then divide it by 2 and get 12. That is your median. Your 1st quartile will be 10. Your second quartile will be 15. Your minimum number is 4 and your maximum number is 18.

6 0
3 years ago
Solve<br> 5t &lt; -15 <br><br> T&lt; 3<br> T&lt; -3<br> T&gt; 3<br> T &gt; -3
OLga [1]

Answer:

B

Step-by-step explanation:

5t < -15 (divide by 5 on each side)

t < -3

7 0
3 years ago
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Write an equation to represent the following description.
Stella [2.4K]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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