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2 years ago

What does multiplying a number by -1 mean?

Mathematics

2 answers:

Alex_Xolod [135]2 years ago

7 0

It’s just the same like 1x7=7 :)

OlgaM077 [116]2 years ago

6 0

Answer:

If the number being multiplied by -1 is positive it just turns it negative, but if the number being multiplied by -1 is also negative it becomes positive. Basically if flips the sign.

Step-by-step explanation:

EX) 25 x -1 = -25

EX) -25 x -1 = 25

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What is the answer !

kondor19780726 [428]

Answer:

m∠OKG = 95°

Step-by-step explanation:

In the given question,

Angle OKL and angle OKG are the linear pairs.

And we know that sum of linear pair of angles is 180°.

Therefore, m∠OKL + m∠OKH = 180°

85° + m∠OKH = 180°

m∠OKH = 180° - 85°

= 95°

Therefore, measure of angle OKG = 95° will be the answer.

3 0

3 years ago

What are the 3 angle measures in the triangle shown below

7nadin3 [17]

9514 1404 393

Answer:

B. 39°, 106°, 43°

Step-by-step explanation:

The sum of angle measures in a triangle is 180°. Then the sum of angle expressions will be 180.

(3x +1) +(11x -4) +(5x -7) = 180

19x -10 = 180 . . . . . collect terms

19x = 190 . . . . . . . . add 10

x = 10 . . . . . . . . . . . divide by 19

Then the three angle measures are ...

3·10 +1 = 31
11·10 -4 = 106
5·10 -7 = 43

The appropriate choice is ...

B. 31°, 106°, 43°

6 0

2 years ago

Five sisters each but matching scarves in two pairs of socks the scores are priced at $12 if the total bill for all five sisters

Illusion [34]

Answer:

the one pair of socks cost $2 dollars.

7 0

3 years ago

Suppose a simple random sample of size nequals36 is obtained from a population with mu equals 74 and sigma equals 6. (a) Descri

OlgaM077 [116]

Part a)

The simple random sample of size n=36 is obtained from a population with

$\mu = 74$

and

$\sigma = 6$

The sampling distribution of the sample means has a mean that is equal to mean of the population the sample has been drawn from.

Therefore the sampling distribution has a mean of

$\mu = 74$

The standard error of the means becomes the standard deviation of the sampling distribution.

$\sigma_ { \bar X } = \frac{ \sigma}{ \sqrt{n} } \\ \sigma_ { \bar X } = \frac{ 6}{ \sqrt{36} } = 1$

Part b) We want to find

$P(\bar X \:>\:75.9)$

We need to convert to z-score.

$P(\bar X \:>\:75.9) = P(z \:>\: \frac{75.9 - 74}{1} ) \\ = P(z \:>\: \frac{75.9 - 74}{1} ) \\ = P(z \:>\: 1.9) \\ = 0.0287$

Part c)

We want to find

$P(\bar X \: < \:71.95)$

We convert to z-score and use the normal distribution table to find the corresponding area.

$P(\bar X \: < \:71.95) = P(z \: < \: \frac{71.9 5- 74}{1} ) \\ = P(z \: < \: \frac{71.9 5- 74}{1} ) \\ = P(z \: < \: - 2.05) \\ = 0.0202$

Part d)

We want to find :

$P(73\:$

We convert to z-scores and again use the standard normal distribution table.

$P( \frac{73 - 74}{1} \:< \: z$

5 0

3 years ago

1/5y + 1/8 =3/20 solve for y

Eddi Din [679]

Answer:

y= $\frac{1}{8}$

Step-by-step explanation: $x_{3}$

$\frac{1}{5}y+\frac{1}{8}=\frac{3}{20}$

multiply both sides

8y+5=6

move the constant to the right

8y=6-5

calculate

8y=1

divide both sides

y= $\frac{1}{8}$ or y=0.125

4 0

3 years ago