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3 years ago

Please give the answer fast .I will mark you as brainliest.

Mathematics

2 answers:

Ahat [919]3 years ago

5 0

Answer:

Your handwriting is really nice! Here is what I have so far:

Step-by-step explanation:

1. x + y

A: (2) + (4) = 6

2. (Don't remember how to do this one.)

3. 2x - 7

A: 2(-1) - 7 = -9

4. 7x^2 - 12x + 13

A: 7(16) - 12(4) + 13 = 112 - 48 + 13 = 77

5. -3p^2 + 4p + 7

A: -3(4) + 4(-2) + 7 = -12 -8 + 7 = -13

6. 3a -(a+2b)

A: 3(1) -([1] + 2[-1]) = 3 + (-1 + 2) = 3 + 1 = 4

7. (I can not see the value of Y.)

8. (I can't understand the equation. Please type it out for me in the comments.)

I need clarification for a few before I continue.

OleMash [197]3 years ago

4 0

Answer:

Step-by-step explanation:

x+y

2+4

m-7

9-7

2x-7

2(-1)-7

-1-7

-8

7x^2-12x+13

7(4)^2-12(4)+13

7(16)-48+13

112-48+13

-3p^2+4p+7

-3(-2)^2+4(-2)+7

-3(4)+(-8)+7

-12+-56

-68

3a-(a+2b)

3(1)-(1+(-2))

3-(-2)

5x+2y-(x+y)

Answer: N/a

Value of y not available

5x+6y-32

5(1)+6(-1)

5+(-6)

-1

b^2-5a^3

-2^2-5(-4)^3

4-5(-64)

4-320

316

2a-b/c

Answer: N/A ]

Value of c not known

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Brrunno [24]

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Answer:

The equation is-: y=3x

Step-by-step explanation:

$\large\displaystyle\text{$\begin{gathered} \sf{Substitute \ the \ values \ into \ the \ formula \ y-y_1=m(x-x_1)} \\ \sf {parallel \ lines \ have \ same \ slopes, \ thus} \\ \sf{slope \ of \ the \ 2nd \ line = 3}\\ \sf{now \ substitute \ the \ values} \\ \sf {y-(-5)=3(x-4)}\\ \sf{y+5=3(x-4) (It's \ Point-Slope\;Form, \ see \ below \ for \ slope-intercept)}\\ \sf {y+5=3x-12} \\ \sf{y=3x-12-5} \\ \sf{y-3x-17} \end{gathered}$}}$

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2 years ago

-4+3x=8 solve plzzzz

jarptica [38.1K]

Answer:

x=4

Step-by-step explanation:

-4+3x=8

+4 +4

3x 3x

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3 years ago

Read 2 more answers

The difference between the observed value of the dependent variable and the value predicted using the estimated regression equat

Elenna [48]

Answer:

For this case we define the dependent variable as Y and the independent variable X. We assume that we have n observations and that means the following pairs:

$(x_1, y_1) ,....,(x_n,y_n)$

For this case we assume that we want to find a linear regression model given by:

$\hat y = \hat m x +\hat b$

Where:

$\hat m$ represent the estimated slope for the model

$\hat b$ represent the estimated intercept for the model

And for any estimation of the dependent variable $\hat y_i , i=1,...,n$ is given by this model.

The difference between the observed value of the dependnet variable and the value predicted using the estimated regression equation is known as residual, and the residual is given by this formula:

$e_i = y_i -\hat y_i , i=1,...,n$

So the best option for this case is:

d. residual

Step-by-step explanation:

For this case we define the dependent variable as Y and the independent variable X. We assume that we have n observations and that means the following pairs:

$(x_1, y_1) ,....,(x_n,y_n)$

For this case we assume that we want to find a linear regression model given by:

$\hat y = \hat m x +\hat b$

Where:

$\hat m$ represent the estimated slope for the model

$\hat b$ represent the estimated intercept for the model

And for any estimation of the dependent variable $\hat y_i , i=1,...,n$ is given by this model.

$e_i = y_i -\hat y_i , i=1,...,n$

So the best option for this case is:

d. residual

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3 years ago

Cloud [144]

If you are asking if your work is good,thn yes,you are right

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3 years ago

If postage costs $.54 for the first ounce and $.22 for the each additional ounce, calculate the cost of mailing a 10- ounce enve

sweet-ann [11.9K]

Answer:

Hence, the total cost of mailing 10 ounces is:

$ 2.52

Step-by-step explanation:

If postage costs $.54 for the first ounce and $.22 for the each additional ounce.

i.e. cost of first ounce=$ 0.54.

Now let x denote the number of ounces after the first ounce,

Hence, the cost of x ounces=$ (0.22×x)=$ 0.22 x

Hence, the cost of mailing (x+1) ounces is: $ (0.54+0.22 x)

Now, we have to find the cost of mailing a 10- ounce envelope.

i.e. after the first ounce we need 9 more ounces.

Hence, the total cost of mailing is calculated as:

$=$ (0.54+0.22\times 9)\\\\=$ (0.54+1.98)\\\\=$ 2.52\\$

Hence, cost of mailing 10 ounces is:

$ 2.52

8 0

3 years ago

Read 2 more answers

Please give the answer fast .I will mark you as brainliest.​

Please give the answer fast .I will mark you as brainliest.