giving out brainliest! Please help me I’m struggling.

Answer:

I)

[tex]\displaystyle A + B + C = 2x^2 + 4xy + 2[/tex]

II)

[tex]\displaystyle A - B + C = 6x^2 -8xy[/tex]

III)

[tex]\displaystyle A + B - C= -4x^2 + 10xy -12[/tex]

Step-by-step explanation:

We are given the three equations:

[tex]\displaystyle A = x^2 + xy -6,\, B = 6xy - 2x^2 +1 \text{ and } C = 3x^2 + 7 -3xy[/tex]

I)

We want to find:

[tex]\displaystyle A + B + C[/tex]

Substitute:

[tex]\displaystyle = (x^2 + xy - 6) + (6xy -2x^2 + 1) + (3x^2 + 7 -3xy)[/tex]

Rewrite:

[tex]\displaystyle = (x^2 + 3x^2 - 2x^2) + (xy + 6xy - 3xy) + (-6 + 1 + 7)[/tex]

And combine like terms. Hence:

[tex]\displaystyle A + B + C = 2x^2 + 4xy + 2[/tex]

II)

We want to find:

[tex]\displaystyle A - B + C[/tex]

Likewise, substitute:

[tex]\displaystyle = (x^2 + xy - 6) - (6xy - 2x^2 + 1) + (3x^2 + 7 - 3xy)[/tex]

Distribute:

[tex]\displaystyle = (x^2 + xy - 6) + (-6xy +2x^2 - 1) + (3x^2 + 7 - 3xy)[/tex]

Rewrite:

[tex]\displaystyle = (x^2 + 2x^2 +3x^2) + (xy - 6xy -3xy) + (-6 -1 + 7 )[/tex]

And combine like terms. Hence:

[tex]\displaystyle A - B + C = 6x^2 -8xy[/tex]

III)

We want to find:

[tex]\displaystyle A + B - C[/tex]

Substitute:

[tex]\displaystyle = (x^2 + xy - 6) + (6xy - 2x^2 + 1) - (3x^2 + 7 - 3xy)[/tex]

Distribute:

[tex]\displaystyle = (x^2 + xy - 6) + (6xy - 2x^2 + 1) + (-3x^2 - 7 + 3xy)[/tex]

Rewrite:

[tex]\displaystyle = (x^2 - 2x^2 - 3x^2) + (xy +6xy +3xy) + (-6 +1 - 7)[/tex]

And combine like terms. Hence:

[tex]\displaystyle A + B - C= -4x^2 + 10xy -12[/tex]

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Explanation:

The area of any given sheet of paper is 8.5*11 = 93.5 square inches.

Divide the volume over this area to get the height of the stack

187/(93.5) = 2

The stack is 2 inches tall.

Extra info: The thickness of each piece of paper is 2/500 = 0.004 of an inch which approximates to about 0.1016 mm.

Answer:

11. 10, 20,30,40,50,60,70

12. 35, 45,55,65,75,85,95

Step-by-step explanation:

10 dollars per week for 7 weeks in equivalent to 10x7 which equals $70.

If you already had $25 you would do 10x7+25. Using PEMDAS you would multiply first (10x7=70) then add 25 (70+25=95)

Answer:

9.6 square inches.

Step-by-step explanation:

We are given that ΔBAC is similar to ΔEDF, and that the area of ΔBAC is 15 inches. And we want to determine the area of ΔDEF.

First, find the scale factor k from ΔBAC to ΔDEF:

[tex]\displaystyle 5 k = 4[/tex]

Solve for the scale factor k:

[tex]\displaystyle k = \frac{4}{5}[/tex]

Recall that to scale areas, we square the scale factor.

In other words, since the scale factor for sides from ΔBAC to ΔDEF is 4/5, the scale factor for its area will be (4/5)² or 16/25.

Hence, the area of ΔEDF is:

[tex]\displaystyle \Delta EDF = \frac{16}{25}\left(15\right) = 9.6\text{ in}^2[/tex]

In conclusion, the area of ΔEDF is 9.6 square inches.

Answer: 0.15 meters taller

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

of means multiply and is means equals

2/3 *x = 24

Multiply each side by 3/2

3/2 * 2/3 *x = 24 * 3/2

x = 36

Answer:

DO NOT CHEAT

Step-by-step explanation:

IT'S HARAM >:(

Answer:

[tex] -( x) + 2 = 2(3x - 6) \\ - x + 2 = 2 \times 3x - 2 \times 6 \\ - x + 2 = 6x - 12 \\ x \: terms \: togther \\ - x - 6x = - 12 - 2 \\ - 7x = - 14 \\ x = \frac{ - 14}{ - 7} = 2 \\ x = 2 \\ thank \: you[/tex]

Answer:

rational numbers and real numbers

Step-by-step explanation:

Answer:

38

Step-by-step explanation:

4 × 5 + [14 + 8] - 36 ÷ 9

4 × 5 + 22 - 36 ÷ 9

4 × 5 + 22 - 4

20 + 22 - 4

42 - 4

38

Step-by-step explanation:

use pemdas

P= parenthesis

E= exponents

M= multiply

D= divide

A= addition

S= subtraction

Answer:

(x) = -x/4+2

Step-by-step explanation:

Inverse the function, so swap the places of x and y

x = -4y + 8

Then solve for y

x - 8 = -4y

-x/4 + 2 = y

y = -x/4 + 2

g(x) = -x/4+2

The equation of the line that is parallel to the line 5x + 2y = 12 and passes through the point (-2, 4) is y = [tex]-\frac{5}{x} x-1[/tex]

Parallel lines have the same slope. Therefore, using slope intercept form.

y = mx + b

m = slope

b = y-intercept

Therefore,

5x + 2y = 12

2y = -5x + 12

[tex]y = -\frac{5}{2} x+12[/tex]

The slope of the line is [tex]-\frac{5}{2}[/tex]

Base on parallelism, for the line that passes through (-2, 4)

y = mx + b

4 = [tex]-\frac{5}{2} (-2)+b[/tex]

b = -1

Therefore,

y =

learn more on parallel lines here: https://brainly.com/question/18245473

Answer:

A

Step-by-step explanation:

Given

- k - (- 8k + 7) ← distribute parenthesis by - 1

= - k + 8k - 7 ← collect like terms

= 7k - 7 → A

Answer:

7k + 7

Step-by-step explanation:

-k - (-8k + 7)

-k + 8k + 7

7k + 7

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Answer:

The number is 775

7=7

7+7+5=19

775 is a multiple of 5

Answer:

$4.25

Step-by-step explanation:

11+22+54+14=112

$220+$256= 476

476÷112=$4.25

Answer:

6x-2

Step-by-step explanation:

The perimeter of a rectangle is found by

P = 2(l+w)

  =2( x-2 + 2x+1)

Combine like terms

P = 2(3x-1)

Distribute

P = 6x-2

Width = 2w , Length = w+5 , perimeter = 40

Perimeter of rectangle = 2 (Length + Width)

P= 2 (L + w)

40 = 2 [ (w+5) + (2w) ]

40 = 2 ( 3w+5)

40= 6w +10

6w= 40 – 10

6w= 30

w = 30/6

w = 5

Width = 2w = 2(5) = 10

Length = w + 5 = 5+5 = 10

I hope I helped you^_^

Answer:

y = 0

Step-by-step explanation:

To find the slope, we have to plug the values into the slope-intercept formula.

y2 - y1 / x2 - x1

0 - 0 / 4 - (-10)

0 / 14

= 0

Answer:

24.00

Step-by-step explanation:

24.oo to the nearest hundred

Answer:

The answer is B

Step-by-step explanation:

Answer:

B .-12 and -12

Step-by-step explanation:

it is because when we multiply two -digit the answer is in +

so like in the same -12 * -12=144

And when we add the digit we get -24

Hence, it is proved

Use the Pythagorean theorem to solve for the diagonal distance

Diagonal = sqrt(50^2 + 150^2)

Diagonal distance = sqrt(25,000)

Diagonal distance = 158.11 feet

Round to 158 feet.

If the stayed on the sidewalk they would walk 50 + 150 = 200 feet.

The distance they saved = 200-158 = 42 feet

Answer: 42 feet.

Answer:

12 sides

Step-by-step explanation:

The sum of the exterior angle and the interior angle = 180° , then

3x + x - 20 = 180

4x - 20 = 180 ( add 20 to both sides )

4x = 200 ( divide both sides by 4 )

x = 50

Then

exterior angle = x - 20 = 50 - 20 = 30°

The sum of the exterior angles of a polygon = 360°

The number of sides n is sum divided by 1 exterior angle , that is

n = 360° ÷ 30° = 12

Step-by-step explanation:

A

3(6+15)

=3(21)

=63

B

5[15-(6+1)]

=5(8)

=40

B

⅓(15)

=5

C

⅓(6+15)

=⅓(21)

=7

E

15/6

=2/1/2 or 2.5

W

2(6)(15-3)

=2(7)

=36

L

4(⅓+⅓+⅓)

=4(1)

=4

L

6/15 - 15/6

=36/90 - 225/90

= -189/90

= -21/10

Answer:

[tex]y = \frac{3}{5} x + \frac{49}{5} [/tex]

Step-by-step explanation:

slope = -5/3

Perpendicular slopes must be opposite reciprocals of each other:  m1 * m2 = –1

With the new slope, use the slope intercept form and the point to calculate the intercept: y = mx + b

the new slope = 3/5

y = 3/5 x + b

8 = -9/5 +b

b = 40/5 + 9/5 = 49/5

y=3/5x + 49/5