URGENT!! ILL GIVE BRAINLIEST!!!! AND 100 POINTS!!!

The sum of the x-coordinates of the points that lie in the region above the straight line y = 2x + 7 in coordinate plane is thirty-eight.

A point lies above the straight line , y = 2x + 7 in co-ordinate plane . If its y -coordinate is greater than two times its x-coordinate plus 7. Now, we are checking the each ordered pair one by one ,

(i) plug x = 3 and y = 10

2x + 7 = 3×2 + 7 = 13 > 10

(ii) plug x = 6 in 2x+7

=> 2× 6 + 7 = 19 < 20

(iii) x = 12

=> 2x + 7 = 2× 12 + 7 = 31 < 35

(Iv) x = 18

=> 2x + 7 = 2× 18 + 7 = 43 > 40

(v) x = 20

2x + 7 = 2×20 + 7 = 47 < 50

We see (6, 20) , ( 12,35) and (20,50) satisfy this condition. Now, we determine the sum of x-coordinates . The sum of the x-coordinates of these points is 6 + 12 + 20 = 38 . So, required sum of x-coordinates is 38.

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Complete question:

Of the five points (3, 10), (6, 20),(12, 35), (18, 40)and (20, 50), what is the sum of the x-coordinates of the points that lie in the region above the line

y = 2x + 7 in coordinate plane.

The power series representation for the given function is:

1+ 9x + (9x)² + (9x)³ + .... (9x)ⁿ (where 0 ≤ n ≤ ∞).

What is the power series?

Power series is a sum of terms of the general form aₙ(x-a)ⁿ. Whether the series converges or diverges, and the value it converges to, depends on the chosen x-value, which makes power series a function.

Let u = 9x.

Return to the series above and replace each u with a 9x directly:

Where 0 n , 1 + 9x + (9x) 2 + (9x) 3 +.... (9x) n

Here, the interval of convergence is easily found. It follows that

|9x| 1 -1/9 x 1/9 because we know that geometric series must have | u | = 1

Finally, we may leverage the fact that geometric series have a sum to get the sum: S = a / (1 - u).

Here, u = 9x and a = 1

Therefore, the total is simply S = 1 /(1 - 9x).

Any sum can be calculated provided x is between -1/9 and x and less than 1/9.

Hence, The power series representation for the given function is:

1+ 9x + (9x)² + (9x)³ + .... (9x)ⁿ (where 0 ≤ n ≤ ∞).

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Answer:

The pattern is in the order of even number being added or subtracting (takes turns)

Step-by-step explanation:

12,18,10,20,8

12 to 18 is plus 6

18 to 10 is minus 8

10 to 20 is plus 10

20 to 8 is minus 12

[tex]12 + 6 = 18 \\ 18 - 8 = 10 \\ 10 + 10 = 20 \\ 20 - 12 = 8 \\ 8 + 14 = 22 \\ 22 - 16 = 6 \\ = 24 \\ = 4 \\ = 26 \\ = 2 \\ ..[/tex]

Answer:

The coordinates would be (12,1)

Step-by-step explanation:

The number of miles Carlos drove the rental car is 88 miles.

Carlos paid a total of $64 to rent a car. The rental company charges a one-time fee of $20, with an additional charge of $0.50 per mile driven.

Therefore, the number of miles Carlos drive the rental car can be calculated as follows:

Using equation,

let

x = number of miles driven

64 = 20 + 0.50x

subtract 20 from both sides of the equation'

64  - 20 = 20 - 20 + 0.50x

44 = 0.50x

divide both sides by 0.50

Therefore,

44 / 0.50 = 0.50x / 0.50

x = 88

Therefore, the number of miles is 88 miles.

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By using  ε - δ  definition of limit, the proof of

The limit of a function exists at a cluster point c if and only if the left- and right-handed limits both exist at c and are equal

has been shown below.

What is ε - δ  definition of limit?

Let the function be f(x), cluster point be c and the limit be l. Then

the limit of a function exists at a cluster point c if

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that |x − c |< δ ⟹ |f(x) − l| < ε

Let the limit exist at a cluster point c. Let the limit be l

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that |x − c |< δ ⟹ |f(x) − l| < ε

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that 0 < c - x < δ ⟹ |f(x) − l| < ε or

                                                                         0 < x - c < δ ⟹ |f(x) − l| < ε

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that c - δ < x < c ⟹ |f(x) − l| < ε or

                                                                         c < x < c + δ ⟹ |f(x) − l| < ε

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that c - δ < x < c ⟹ |f(x) − l| < ε  and

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that   c < x < c + δ ⟹ |f(x) − l| < ε

So the left hand and right hand limit exist and are equal.

Let the left hand and right hand limit exist and are equal.

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that c - δ < x < c ⟹ |f(x) − l| < ε  and

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that   c < x < c + δ ⟹ |f(x) − l| < ε

Let [tex]\delta_3 = min\{\delta_1, \delta_2\}[/tex]

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that c - [tex]\delta_1[/tex] < x < c ⟹ |f(x) − l| < ε  and

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that   c < x < c + [tex]\delta_2[/tex] ⟹ |f(x) − l| < ε

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that c - [tex]\delta_1[/tex] < x < c or  c < x < c + [tex]\delta_2[/tex]⟹ |f(x) − l| < ε  

For every [tex]\epsilon[/tex] > 0, there exist a [tex]\delta[/tex] > 0 such that |x - c| < [tex]\delta_3[/tex] ⟹ |f(x) − l| < ε  

The limit of a function exists at a cluster point c and the limit is l

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Answer:

B

Step-by-step explanation:

[tex]3x {}^{2} - 7x + 14 + 5 {x }^{2} + 4x - 6 = 8 {x}^{2} - 3x + 8[/tex]

a matrix is a collection of integers that have been put in rows and columns to make a rectangular array. The entries of the matrix are the integers, which are referred to as its elements.

Linear algebra is a subfield of mathematics that mostly uses matrices. When you start solving linear equation systems, linear algebra first starts to seem good. You may concentrate on the figures and greatly simplify the procedure by condensing all the information into a single large chart and leaving out the rest.

Almost as their name implies, square, symmetric, triangular, and diagonal matrices. All-zero identity matrices except along the major diagonal, where the values are

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Answer:

A

Step-by-step explanation:

A. This is true and occurred during the industrial revolution

B. The government had not started managing the economy (yet)

C. This was happening even in the 1700s

D. This was also more apparent in the 1700s with the 13 colonies, especially with cash crops such as tobacco.

Answer:the general form of a hyperbola is 6x^2-5y^2+12x+50y-149=0 the answer is (x+1)^2/5 -((y-5)^2/6=1

Step-by-step explanation:

Answer:

  P/Q = (-3x +2)/(3(3x -1))

  PQ = 12/((3x -1)(-3x +2))

Step-by-step explanation:

You want the quotient and product of P(x) = 2/(3x -1) and Q(x) = 6/(-3x +2).

The quotient is found by multiplying by the inverse of the denominator:

  [tex]P(x)\div Q(x)=\left(\dfrac{2}{3x-1}\right)\div\left(\dfrac{6}{-3x+2}\right)=\left(\dfrac{2}{3x-1}\right)\times\left(\dfrac{-3x+2}{6}\right)\\\\\\\dfrac{2(-3x+2)}{6(3x-1)}=\boxed{\dfrac{-3x+2}{3(3x-1)}}[/tex]

As with multiplying any fractions, the numerator is the product of the numerators, and the denominator is the product of the denominators.

  [tex]P(x)\times Q(x)=\left(\dfrac{2}{3x-1}\right)\times\left(\dfrac{6}{-3x+2}\right)=\dfrac{2\cdot 6}{(3x-1)(-3+2)}\\\\\\=\boxed{\dfrac{12}{(3x-1)(-3x+2)}}[/tex]

__

Additional comment

Usually the simplified form would contain no parentheses. The indicated products would be multiplied out.

The number of cell phones sold in 2015 is (0.29)(1.28x)

The correct answer is A) (0.29)(1.28x).

What is a linear equation?

A linear equation is an equation in which the highest power of the variable is 1. Linear equations can be written in the form ax + b = 0, where a and b are constants and x is the variable. Linear equations are called "linear" because they represent a straight line when plotted on a graph.

We are told that the number of cell phones Hongbo sold in 2014 was 128% greater than in 2013, which means that he sold 128/100 = 1.28 times as many cell phones in 2014 as he did in 2013. This can be represented by the equation x * 1.28 = number of cell phones sold in 2014.

We are also told that the number of cell phones Hongbo sold in 2015 was 29% greater than in 2014, which means that he sold 29/100 = 0.29 times as many cell phones in 2015 as he did in 2014. This can be represented by the equation (number of cell phones sold in 2014) * 0.29 = number of cell phones sold in 2015.

Substituting the first equation into the second equation, we get:

(x * 1.28) * 0.29 = number of cell phones sold in 2015

This simplifies to:

(0.29)(1.28x) = number of cell phones sold in 2015

Hence, the number of cell phones sold in 2015 is (0.29)(1.28x)

the correct answer is A) (0.29)(1.28x).

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Answer:

y = -x + 8

Step-by-step explanation:

First find the slope (m):

m = (0-2) / (8-6) = -1

Next put one of the points (I pick (8,0)) into the point-slope formula:

y-y1 = m(x-x1)

y-0 = -1(x-8)

Now write it in slope-intercept form:

y = -x + 8

Answer:

x = -9; y = 1

Step-by-step explanation:

       x - 3y = -12

-     5x - 3y = -48

-------------------------

      -4x      = 36

x = -9

-9 - 3y = -12

-3y = -3

y = 1

Situation which illustrates best the concept of absolute advantage is: Option A - A German factory can build more sports cars than foreign factories.

Absolute advantage is the potential of an individual,  a company, or a  country to produce a higher quantity of output than its competitors while using the same inputs. It means an institution with absolute advantage has more efficiency in producing a particular commodity than its rivals. It utilizes lower marginal cost (materials and labor), making its output much cheaper than others.

A factory in German has an absolute advantage because it can produce more sports car  than foreign countries. Absolute advantage makes the factory more competitive in the market than its rivals.

Therefore, the correct answer is option A.

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The point of interaction of two circles:

(x-a)²+(y-b)² = ro²

(x-c)²+(y-d)² = r1²

The e point of interaction of the two circles is given by the formulas given below:

       D = √(c-a)²+(d-b)²

        б = √(D+r0+r2)(D+r0-r2)(D-r0+r2)(-D+r0+r2)

        X1,2 = a + c/2 + (c-a)(r0² - r1²)/2D² ± 2 b-d/D²

        X1,2 = b + d/2 + (d-b)(r0² - r1²)/2D² ± 2 a-c/D²

r0 = 935.62 ft

r1 = 959.630 ft

a = 553.7

b = 1147.86

c = 1162.93

d = 269.83

First we calculate,

                            D = √(c-a)²+(d-b)²

                               = 1980.95 ft

Lets check whether these circles intersect or not:

D<r0+r1 and D> r0-r1

r0+r1 = 2166.57 ft and D = 1980.95 ft -192.51 = 192.51 which is less than D

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Answer:

$16.50

Step-by-step explanation:

$110 * 15% =

$110 * 15/100 =   ==> percent value is 100 times greater than the fraction

$1650/100 =  ==> multiply 110 and 15

$16.50

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Answer:

Tip=[tex]16.50[/tex]

Step-by-step explanation:

Tip%=15

Bill=$110

Tip=[tex]\frac{15}{100}[/tex]x[tex]110[/tex]

Tip=[tex]16.50[/tex]

Hope this helps u

Details scalcets,

a) If u is unit vector , then, ⃗u.⃗v = 1/2 and ⃗u.⃗w = - 1/2 where v and w also unit vectors.

b) Exact value of angle between the vectors is 34.3803442 and Approximation value, 34.4..

c) Exact value of the angle between the vectors, a = 71 - 2j + k, b = 3i - k is 30.60889766 ~ 30.61 (approximation value).

In mathematics, a unit vector is defined as a normed vector space is a vector of length one.

a) If u is a unit vector , we have to calculate ⃗u.⃗v and ⃗u.⃗w where v and w are also unit vectors.

We know that, Angle between two vectors θ is

Cosθ = u⃗ .⃗v/|u| |v|

=> cos 60° |u| |v| = ⃗u.⃗v

=> ⃗u.⃗v = 1/2(1)(1) = 1/2

Also, Cosθ = ⃗u.⃗v/|u| |w|

=> Cosθ |u| |w| = ⃗u.⃗w

=> ⃗u.⃗w = cos 120° (1)(1)

=> ⃗u.⃗w = -1/2

So, ⃗u.⃗v = 1/2 and ⃗u.⃗w = - 1/2

b) We have, a = (7,2), b = (3,-1)

Cosθ = a.b/|a| |b|

|a| = √(7)²+ (2)² = √49+4 = √53

|b| = √(3)²+ (-1)²= √9+1 = √10

a.b = 7×3 - 2×1 = 21 - 2 = 19

so, Cos θ = 19/√10 (√53) = 19/√530

=> θ = Cos⁻¹( 19/√530)

=> θ = 34.3803442 ~ 34.4

c) We have, a = 7i - 2j + k, b = 3i - k

Cos θ = a.b/|a| |b|

|a| = √(7)² + (-2)² +(1)² = √49+4+1 = √54

|b| = √(3)²+ 0 +(-1)² = √9+1 = √10

a.b = (7i - 2j + k).(3i - k) = 21 -0 - 1 = 20

Cosθ = 20/√10√54 = 20/√540

θ = cos⁻¹(20/√540) = 30.60889766 ~ 30.61

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For the regression equation, ŷ = b₀ + b₁x where b₁ is slope of this line and it is equals to (n∑xy - ∑x∑y)/(n∑x² - (∑x)²) and b₀ is y-intercept which is equals to (∑y - b₁ ∑x)/n .

A regression line indicates the linear relationship between the dependent variables on the y-axis and the independent variables on the x-axis. Correlation is determined by analyzing the data pattern formed by the variables.

The regression line is plotted closest to the data points in the regression plot. We use the ordinary least squares estimation method (O.L.S.E), to find the formulas to calculate the slope and intercept of the regression line, which minimizes the sum of squares due to the error. A simple linear regression model is given by y = b₀ + b₁x --(*)

where y : dependent variable

x: independent variable

b₁ --> slope of regression line

b₀ --> y-intercept

We have , regression line is ,

ŷ = (slope )x+ (y intercept)

ŷ represet the predicted value.

The formulas to compute slope(b₁) value and y-intercept (bo) value of regression line are following:

b₁ = (n∑xy - ∑x∑y)/(n∑x² - (∑x)²) and

b₀ = ŷ - b₁x = (∑y - b₁ ∑x)/n

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The function of the line and parabola shown in the graph is x + 6 ≤ 1 and x² + 3 > 1 respectively, so, option A is correct.

Each element of X receives exactly one element of Y when a function from one set to the other is used. The sets X and Y are collectively referred to as the function's domain and co-domain, respectively.

Given:

The graph of the function,

Calculate the equation of the line which is passing through (-6, 0) and (0, 5) as shown below,

y - 5 = 5 - 0 / 0 - (-6) (x - 0)

y - 5 = 5 / 6 x

6y - 30 = 5x

And the equation of the parabola can be written as,

x² + 3 = 0

From the graph, it can be seen that the solution of the line is where the line graph and parabola graph can meet,

Thus, the line will be x + 6 ≤ 1 and x² + 3 > 1.

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The value of the expression is x

From the question, we have the following parameters that can be used in our computation:

x + y = x - y

x - 2y = ?

Recall that. we have

x + y = x - y

Add y to both sides of the equation

So, we have the following representation

x + 2y = x

Add -2y to both sides of the equation

So, we have the following representation

x = x - 2y

Rewrite as

x - 2y = x

Hence, the solution of x - 2y is x

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Answer:

1,150 cubic feet.

Step-by-step explanation:

The volume of a hemisphere with a radius of 6.4 feet can be calculated using the formula 4/3 * pi * r^3, where r is the radius of the hemisphere. Plugging in the values, we get 4/3 * pi * 6.4^3 = approximately 1,153 cubic feet. Rounded to the nearest tenth, the volume of the hemisphere is 1,150 cubic feet.

Answer:

$47.25

Step-by-step explanation:

First we find how much the tax will be

45x0.05

2.25

and now we add to find the total

45+2.25

47.25

hopes this helps

The area of the shaded region is 425 cm².

Let us find the area of the entire figure first and subtract the unshaded region area to find the area of the shaded region.

The given figure is of a square of side 25 cm.

Total area = 25²

=> 625 cm²

The shaded figure inserted is a rhombus.

Apart from this , we can observe four unshaded triangles of equal area.

Area of each individual triangle :

=> ½ × 5 × 20

=> 50 cm²

Area of 4 triangles ;

=> 200 cm²

Remaining area of the shaded figure :

=> 625 - 200

=> 425 cm² .

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The length of the mid-segment of the trapezoid is 6

The trapezium is a quadrilateral where 1 pair of sides are parallel and the sum of angle pairs between parallel lines is 180 degrees.

We have,

The vertices of a trapezoid:

E = (-3, 3)

F = (1, 3)

G = (3, -3)

H = (-5, -3)

The figure can be considered as,

            E____________F

             /                           \

      M /                                \ N

     /                                        \

H/_____________________\G

MN is the mid-segment of the trapezoid.

MN = (EF + HG) / 2

EF = √(4² + 0) = 4

HG = √(8² + 0) = 8

MN = (4 + 8) / 2

MN = 12/2

MN = 6

Thus,

6 is the length of the mid segment of the trapezoid.

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A. The graph of the absolute value function is V-shaped, with the features given as follows:

B. The transformation is that the function was shifted right two units, hence the features are given as follows:

The absolute value function, with vertex (h,k), is defined as follows:

y = |x - h| + k.

The features of the function are given as follows:

For the first item, the function is |x + 3|, hence we just have to identify the features.

For the second function, the definition if h(x) = |x - 2|, with vertex at (2,0), meaning that the function was shifted two units right from the parent absolute value function y = |x|. The shift just changes the turning point of the graph, not altering domain and range.

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