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3 years ago

What is the answer to -1 times 2

Mathematics

2 answers:

Charra [1.4K]3 years ago

5 0

It would equal -2 any positive number times -1 is a negative

yanalaym [24]3 years ago

4 0

Answer:

Negative 2.

Step-by-step explanation:

2x -1 would have an outcome of a negative number since 2 is positive and one is negative. if they were both positive numbers or negative numbers then the answer would be positive

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3 years ago

If the third term in an arithmetic sequence is 7 and the common difference is -5, what is the value of the fourth term?

kozerog [31]

Answer: 2

Step-by-step explanation:

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3 years ago

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15. (3x + 6) - (3x - 6)

coldgirl [10]

Answer:

Step-by-step explanation:

Distribute the negative which would get your 3x + 6 -3x + 6. The 3x would cancel out and you would add 6+6 = 12

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3 years ago

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Evaluate C_n.xP^xQn-x For the given n=7, x=2, p=1/2

r-ruslan [8.4K]

Answer:

The value of given expression is $\frac{21}{128}$ .

Step-by-step explanation:

Given information: n=7, x=2, p=1/2

$q=1-p=1-\frac{1}{2}=\frac{1}{2}$

The given expression is

$C(n,x)p^xq^{n-x}$

It can be written as

$^nC_xp^xq^{n-x}$

Substitute n=7, x=2, p=1/2 and q=1/2 in the above formula.

$^7C_2(\frac{1}{2})^2(\frac{1}{2})^{7-2}$

$\frac{7!}{2!(7-2)!}(\frac{1}{2})^2(\frac{1}{2})^{5}$

$\frac{7!}{2!5!}(\frac{1}{2})^{2+5}$

$\frac{7\times 6\times 5!}{2\times 5!}(\frac{1}{2})^{2+5}$

$21(\frac{1}{2})^{7}$

$\frac{21}{128}$

Therefore the value of given expression is $\frac{21}{128}$ .

7 0

3 years ago

Find the value of x<br> in this polygon.<br> help !!!

Paladinen [302]

Answer:

solution,

Sum of exterior angle of polygon=360°

$3x - 5 + 2x + 10 + 90 = 360 \\ or \: 3x + 2x - 5 + 10 + 90 = 360 \\ or \: 5x + 5 + 90 = 360 \\ or \: 5x + 95 = 360 \\ or \: 5x = 360 - 95 \\ or \: 5x = 265 \\ or \: x = \frac{265}{5} \\ x = 53$

Hope this helps...

Good luck on your assignment...

8 0

4 years ago