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Annette [7]
3 years ago
5

What is negative 2 plus positive two (-2+2) ????

Mathematics
2 answers:
dmitriy555 [2]3 years ago
6 0

Answer:

A_ 1,2,4,5,-1, or,-2

3 plus any of these will always leave you with a positive number of 1-8

B_ -1, -3, -4, -5, or 1

-2 plus any of these will leave you with a negative number of -7 through -1

C_ 1+(-1)

2+(-2)

3+(-3)

4+(-4)

5+(-5)

since all the numbers are 1-5 are both negative and positive these will cancel out and equal to zero.

Step-by-step explanation:

AleksandrR [38]3 years ago
5 0

Answer:

0

Step-by-step explanation:

(-2+2)

Remove the brackets.

-2+2

= 0

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You roll a fair number cube and flip a coin at the same time. What is the probability that you roll a 5 and flip a heads?
Vikentia [17]

Answer:

probably of a head= 1/2

probably of a multiple of 3 (either 3 or 6)= 2ways*1/6 as 1/6 is the prob of any one side

Step-by-step explanation:

4 0
2 years ago
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How many terms are there in the following expression? x - 5 + 16x + 4 - 2x - 3
k0ka [10]

Answer:

Two terms

Step-by-step explanation:

First, we have to simplify reducing the number of terms, since there are like terms

x-5+16x+4-2x-3

Eventually, you'll get 15x-4,  thus there are two terms.

Please correct me if I'm incorrect, and I'll change the answer, but I hope I helped :)

3 0
2 years ago
Which of the following equations best represents the regression line for the data given in the table above?
navik [9.2K]

B. y = 3x - 2

Step-by-step explanation:

A linear regression line is in form of Y=A+Bx where B is the slope of the line and A is the intercept when x=0

Form a table as shown

x          y        xy           x²         y²

1           4         4            1          16

2           1          2           4          1

3           5         15          9        25

4           10        40        16        100

5           16        80        25      256

6            19        114       36       361

7            15        105       49      225

28          70       360      140     984 ------sum

From the table;

n=7 ---number of data points

∑x = 28

∑y=70

∑xy =360

∑x² =140

∑y² = 984

Applying equations for A and B

A=(∑y)(∑x²) - (∑x)(∑xy) / n (∑x²)-(∑x)²

A=(70)(140) - (28)(360) / 7(140)-(28²)

A=9800 - 10080 / 980-784

A= -280 /196

A= -1.43

B= n(∑xy)-(∑x)(∑y)  / n(∑x²)-(∑x)²

B=7(360)-(28)(70) / 7(140) - (28²)

B=2520-1960 /980-784

B=560/196

B=2.86

The equation will be;

Y=A+Bx

Y=-1.43+2.86x

Y=2.86x-1.43

Learn More

Regression line : brainly.com/question/12280902

Keywords : equations, regression line, data, table

#LearnwithBrainly

7 0
3 years ago
How are prisms and pyramids alike and how are they different?
LenKa [72]

Answer:

Prisms have two congruent — or identical — bases, and pyramids only have one base. The shape of the base on pyramids and prisms can vary, depending on the shape of the overall three-dimensional object. A prism has two identical bases that are parallel, while a pyramid has one base.

Step-by-step explanation:

7 0
2 years ago
One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold i
juin [17]

Answer:

Probability that 300 or more will be recycled is 0.0314.

Step-by-step explanation:

We are given that one environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled.

Also, 388 cans are sold today.

The above situation can be represented through Binomial distribution;

P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....

where, n = number of trials (samples) taken = 388 cans

            r = number of success = 300 or more

           p = probability of success which in our question is % of aluminum

                 cans sold in the area that were recycled, i.e; 73%

<em>LET X = Number of cans that are recycled</em>

SO, X ~ Binom(n = 388, p = 0.73)

<em>Now, here we can't find the probability that 300 or more will be recycled using binomial distribution because the sample size is very large here (n > 30), so we will use Normal approximation to find the respective probability.</em>

So, mean of binomial distribution = E(X) =  n\times p

                                                        = 388 \times 0.73 = 283.24

Standard deviation of binomial distribution = S.D.(X) = \sqrt{n\times p \times (1-p)}

                                                                        = \sqrt{388 \times 0.73 \times 0.27 }  

                                                                        = 8.74

<em />

<em>Let Y = Number of cans that are recycled for normal approximation;</em>

So, Y ~ Normal(\mu=283.24,\sigma = 8.74)

The z-score probability distribution for normal distribution is given by;

<em>                </em>   Z = \frac{Y-\mu}{\sigma}  ~ N(0,1)

Now, probability that 300 or more will be recycled is given by = P(Y \geq 300) = P(Y > 299.5)      --------------{using continuity correction}

<em>        </em> P(Y > 299.5) = P( \frac{Y-\mu}{\sigma} > \frac{299.5-283.24}{8.74} ) = P(Z > 1.86) = 1 - P(Z \leq 1.86)

                                                                   = 1 - 0.9686 = 0.0314

<em>The above probability is calculated using z table by looking value of  x = 1.86 in z-table.</em>

<em />

Therefore, the probability that 300 or more will be recycled is 0.0314.

8 0
3 years ago
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