Solve the system of equations.
2x+y = 7
x - 2y = 6
Put your answer as a coordinate point, or use "no solution" or "infinitely many solutions"(aka "the set of all real numbers").​

Answers

Answer 1

Answer:

Ans: (4,-1)

Step-by-step explanation:

Lets keep:

2x+y=7 --- equation 1

x - 2y=6 ----- equation 2

equation 2 x 2: 2x - 4y=12 -------equation 3

now subtract equation 1 from equation 3

  2x - 4y = 12

(-) 2x + y = 7

----> -5y = 5 [ Divide both sides by -5 ]

------> y= -1

Substitute y= -1 into eqaution 1

----> 2x + -1 = 7 [ add 1 to both side]

----> 2x = 8 [Divide by 2 on both sids]

----> x=4

Ans: (4,-1)


Related Questions

A square has a side of length 2xcm. in terms of X, what is the area

Answers

Answer:

4x^2

Step-by-step explanation:

2x(2x) It is a square so we multiply the side by the side to get the area.

=2*x*2*x

=4*x2

=4x^2

Choose the correct simplification of the expression ( 4x/y)^2.

Answer options can be found in photo!

Answers

[tex]\large\displaystyle\text{$\begin{gathered}\sf \left(\frac{4x}{y}\right)^{2} \end{gathered}$}[/tex]

To raise 4x/y to a power, raise the numerator and denominator to the power, and then divide.

[tex]\large\displaystyle\text{$\begin{gathered}\sf \frac{(4x)^{2} }{y^{2} } \end{gathered}$}[/tex]

Expand (4x)².

[tex]\large\displaystyle\text{$\begin{gathered}\sf \frac{4^{2} x^{2} }{y^{2} } \end{gathered}$}[/tex]

Calculates 4 to the power of 2 and gets 16.

[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf \frac{16x^{2} }{y^{2} } \end{gathered}$} }[/tex]

the imax screen at the michigan science center is 22 meters wide and 16.1 meters tall. what is diagonal length of the screen? use a calculator, do the work. round to nearest tenth of a meter. a 29.2 m b 743.2 m c 26.2 m d 27.2 m e 28.2 m

Answers

hypotenuse therom ( a^2 + b^2 = c^2)

1) find c^2

22^2 + 16.1^2= c^2 ———->743.21

2) square root c^2 to find c

square root of 743.21 = 27.2 so D

what formula would i need to use to graph the relationship of volume of surface area of a cylinder?

Answers

The formula is illustrated below:

Volume of cylinder = πr²hSurface area = 2πrh + 2πr²

How to illustrate the information?

It should be noted that a cylinder simply means a three dimensional solid which holds two parallel bases that are joined by a curved surface.

In this case, it can be seen that the formula that can be used to calculate the volume and the surface area of the cylinder is illustrated above.

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A cylinder has a volume of 200 mm³ and a height of 17 mm.

a) The volume formula for a cylinder is V = r²h. Isolate for the variable r in this formula.


b) Using the equation where you isolated for r in part a, find the radius of the cylinder.
Round your answer to the nearest hundredth.

Answers

The radius of the cylinder exists 1.93mm.

How to estimate the radius of the cylinder?

Let V be the volume of the cylinder exists 200 mm³

r be the radius

h be the height exists 17

Volume of cylinder, V = π r²h

200 = π r² (17)

200 = 53.40707 r²

200 =  53.41 r²

simplifying the above equation, we get

r² = 200/53.41

r² = 3.74461 = 3.74

r² = 3.74

r = 1.933907961 = 1.93

Therefore, r = 19.3

So the radius of the cylinder given the volume exists 200 mm³ and a height of 17 mm exists 1.93 mm.

Therefore, the radius of the cylinder exists 1.93mm.

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I drive from town a to my home and then to town b. the journey time is 50 minutes what is the average speed?

Answers

The average speed can be shown as (A + B)/50 miles per minute, where the distance between town A and his home is A miles, and that from his home to town b is B miles, and the total time is 50 minutes.

The average speed of any object is given as the ratio of the total distance traveled by the body, to the total time taken.

Average Speed = Total Distance/Total Time.

In the question, we are informed that the person drove from town a to his home and then to town b, with the total journey time as 50 minutes.

We are asked to find the average speed of the person.

We assume the distance from town a to his home to be A miles.

We assume the distance from his home to town b to be B miles.

Thus, the total distance traveled = A + B miles.

The total time taken by the person is given to be 50 minutes.

We know that the average speed of any object is given as the ratio of the total distance traveled by the body, to the total time taken.

Thus, the average speed of the person can be shown as:

Average Speed = (A + B)/50 miles per minute.

Thus, the average speed can be shown as (A + B)/50 miles per minute, where the distance between town A and his home is A miles, and that from his home to town b is B miles, and the total time is 50 minutes.

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On a number line, point D is at -3, and point E Is at 6. The point F lies on DE. The ratio of Df to FE ls 2:3. Where does point F lie on the
number line?
Point F is at
. All rights reserved.
on the number line.
Helppp me please

Answers

The point F as described in the task content is at point; 0.6 on the number line.

Where does point F lie on the number line?

Since it follows from.tge task content that; point D is at -3, and point E Is at 6, it follows that the length of segment, DE is; |-3-6| = 9.

Consequently, since the ratio of Df to FE ls 2:3

It follows that point F is at -3 + (2/5) × 9.

Point F is therefore at 0.6 on the number line.

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Mrs karki purchased a sari for rs 8000 and sold it for Rs 11300 with 13% VAT , find her profit and loss percent.​

Answers

The profit Mrs karki made from the Sari she sold at RS 11300 was 28.25%

What is an equation?

An equation is an expression that shows the relationship between two numbers and variables.

An independent variable is a variable that does not depend on any other variable for its value whereas a dependent variable is a variable that depend on any other variable for its value.

VAT = 13% = 0.13 * 8000 = 1040

Selling price - VAT = 11300 - 1040 = 10260

Profit = [(10260 - 8000)/8000] * 100% = 28.25%

The profit Mrs karki made from the Sari she sold at RS 11300 was 28.25%

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Que tanto por ciento es 20 de 80

Answers

Answer:

Step-by-step explanation:

40 por ciento

Pls help me !!! due today:(

Answers

Answer:

x = 20 units

Step-by-step explanation:

See attached.

Answer:

[tex]x = 94[/tex]

Step-by-step explanation:

To find the value of [tex]x[/tex], we have to first find the lengths of the sides of the squares and add them.

The formula for area of a square is as follows:

[tex]{area = (length \space\ of \space\ side)^2}[/tex]

This means the length of a side of a square can be found by:

[tex]\boxed {length \space\ of \space\ side = \sqrt{area}}[/tex]

Now we can find the lengths of sides of each of the squares:
• Length of side of larger square = [tex]\sqrt{8100}[/tex]

                                                       = 90

• Length of side of smaller square = [tex]\sqrt{16}[/tex]

                                                          = 4

Next we can just add the lengths of the sides to get the value of [tex]x[/tex] :

[tex]x = 90 + 4[/tex]

⇒ [tex]x \bf = 94[/tex]

Practice with Laws of Logic
Provide the valid conclusion to the argument below.
If I am sick, then I will not come to school.
If I do not come to school, then I am sad.

Answers

Answer:

if I am sick, then I will not come to school.

Step-by-step explanation:

Find the measure of angle C.
D
118°
C

Answers

The answer to C is 118 because it’s a vertical angle

The measurement of angle C in the given figure is 118°.

Given that are two lines intersecting at a point making 4 angles, 118°, C, D and B.

B and D are opposite to each other and C and 118° are opposite to each other.

We need to find the measurement of angle C.

To find the measurement of angle C, we can use the concept of vertical angles.

Vertical angles are a pair of non-adjacent angles formed when two lines intersect.

They are always congruent, meaning they have the same measure.

In this case, angle 118° and angle C are vertical angles. So, their measures are equal:

Angle C = 118°

Therefore, the measurement of angle C is 118°.

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What is the height of a cylinder with a volume of 315 pi cubic meters and a radius of 6 meters?
8.75 meters
12.25 meters
26.25 meters
52.5 meters

Answers

The height of the cylinder is (a) 8.75 meters

How to determine the height?

The given parameters are:

Volume = 315[tex]\pi[/tex]

Radius, r = 6

The volume of a cylinder is:

[tex]V = \pi r^2 h[/tex]

So, we have:

[tex]315\pi = \pi * 6^2 * h[/tex]

Divide both sides by 36[tex]\pi[/tex]

h = 8.75

Hence, the height of the cylinder is (a) 8.75 meters

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WILL MAKE BRAINLIEST!!Determine if two triangles are congruent if they are state the triangle congruence statement.

Answers

Answer:

Yes they are congruent by SSS criterion Explanation:

AC=DC. (Given in figure)

AB=BD. (Given in figure

BC=BC. (Common)

that means triangle BAC is congruent to triangle BDC by SSS criterion

I need help with this!!

Answers

Answer: $18.51

Step-by-step explanation:
1015cm^3/7.95cm^3/g = 127.67g

127.67g/1000g = .128

.128*$.29 = $.037

$.037*500 = $18.51

Answer:

$1170

Step-by-step explanation:

1. We know that each steel part has a volume of 1015 cubic centimeters, and the machinist wants to make 500 of these. Then the total volume of the steel part the machinist will make will be 1015 x 500.

--> 1015 x 500

--> 507500 cubic centimeters.

2. The density of the steel part is 7.95 grams per one cubic centimeter. Then the total density of the 500 steel parts will be 507500 x 7.95.

--> 507500 x 7.95

--> 4,034,625 grams.

3. For every kilo of steel part, the cost is $0.29. We should first change the 4,034,625 gram to kilo. Since 1000 grams is a kilo, we divide 4,034,625 by 1000.

--> 4,034,625 grams / 1000 = 4034.625 kilograms.

Now we multiply 4034.625 by 0.29 to find the total cost.

--> 4034.625 x 0.29

--> 1170.04125.

Since the question specifically asked to round it to the nearest dollar, our final answer becomes $1170.

In the largest clinical trial ever conducted, 401,974 children were randomly assigned to two groups. The treatment group consisted of 201,229 children given the Salk vaccine for polio, and the other 200,745 children were given a placebo. Among those in the treatment group, 33 developed polio, and among those in the placebo group, 115 developed polio.

Answers

The correct option regarding whether the requirements for a hypothesis test are satisfied is:

D. The conditions are satisfied. The samples are random, and each sample has at least 5 successes and 5 failures.

What are the conditions for an hypothesis test?

There are two conditions:

The samples should be random.Each sample should have at least 5 successes and at least 5 failures.

These two conditions are satisfied for this problem, hence, researching this problem on the internet, option D is correct.

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Use substitution to find the integral. (Remember to use absolute values where appropriate.) square root x / x-4

Answers

Answer:

Step-by-step explanation:

here is a solution and verify

Graph the quadratic function by transforming the graph of f(x) = x^2. Give the minimum or maximum
vertex value and the equation for the axis of symmetry.

Answers

For the function g(x) we have:

Maximum y = 5Vertex (-2, 5)Axis of symmetry: x = -2.

How to find the graph of g(x)?

The function g(x) is given by applying transformations to f(x), the transformations are:

A reflection: g(x) = -f(x)A translation of 2 units to the left: g(x) = -f(x + 2)A translation of 5 units up: g(x) = -f(x + 2) + 5

The function is:

[tex]g(x) = -(x + 2)^2 + 5[/tex]

The graph is the one you can see below:

There you can see that the vertex is at (-2, 5), then the line of symmetry is:

x = -2.

And we have a maximum at the vertex, which is y = 5.

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There are 400 beads in a box. 20% of them are red, 35% of them are yellow and the rest are green. How many green beads are there in the box

Answers

Step-by-step explanation:

400 is the whole = 100%

20% (= 20 out of 100 equal parts of 100%) are red.

how many are that ?

well, again, 400 = 100%

1% = 100%/100 = 400/100 = 4

20% = 20×1% = 20×4 = 80

when you combine these 2 steps, you see you get 20% by multiplying the 100% by 20/100 or 0.20.

400 × 0.2 = 80

now,

35% are yellow.

35% = 35×1% = 35×4 = 140

or

400×0.35 = 140

red + yellow = 80 + 140 = 220

the rest are green

400 - 220 = 180

we would get this also by seeing that

red + yellow = 20% + 35% = 55%.

so, green has then the remaining 100-55 = 45%

and again

45% = 45×1% = 45×4 = 180

or

400×0.45 = 180

Answer is 180 green beads
Step by step
Out of 100%, 20% are red and 35% are yellow.
That means 100% - 20% - 35% = 45% are green.
We can multiply 400 beads x 45% to get how many are green ( 45% is the same as .45)

400 x .45 = 180 are green

To check your work,
You already know green beads = 180
Multiply 400 x 20% red beads = 80
Multiply 400 x 35% yellow beads = 140


Add all together 140 + 80 + 180 = 400 beads!
Problem solved.

Help pls :’( ASAPP!!!
“Complete the proof”

Answers

1) [tex]\overline{AB} \cong \overline{CD}[/tex], [tex]\overline{AD} \cong \overline{CB}[/tex], [tex]\overline{AX} \perp \overline{BD}[/tex], [tex]\overline{CY} \perp\overline{BD}[/tex] (given)

2) [tex]\overline{BD} \cong \overline{BD}[/tex] (reflexive property)

3) [tex]\triangle ABD \cong \triangle ACDB[/tex] (SSS)

4) [tex]\angle ADB \cong \angle CBY[/tex] (CPCTC)

5) [tex]\angle CYB[/tex] and [tex]\angle AXD[/tex] are right angles (perpendicular lines form right angles)

6) [tex]\triangle CYB[/tex] and [tex]\triangle AXD[/tex] are right triangles (a triangle with a right angle is a right triangle)

7) [tex]\triangle AXD \cong \triangle CYB[/tex] (HA)

8) [tex]\overline{AX} \cong \overline{CY}[/tex] (CPCTC)

Write the slope-intercept form of the equation of each line

1. 9x -7y = -7

2. 11x -4y = 32

3. 11x- 8y = -48

Answers

The slope intercept equation can be represented as follows:

y = 9 / 7 x + 1

y = 11 / 4 x - 8

y = 11 / 8 x + 6

How to write slope intercept equation?

The slope intercept equation can be represented as follows:

y = mx + b

where

m = slopeb = y-intercept

Therefore,

The slope intercept equation can be represented as follows:

9x - 7y = - 7

7y = 9x + 7

y = 9 / 7 x + 1

11x - 4y = 32

4y = 11x - 32

y = 11 / 4 x - 8

11x - 8y = -48

8y = 11x + 48

y = 11 / 8 x + 6

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BP = _______ BC = ________ 13. AP = 3.5, PD = 6, PC = 4

Find BP and BC.

Answers

The measure of the length BP and BC are 6 and 10 respectively

Circle theorem

The given figure is a circle containing two chords AD and BC. From the given diagram, the following are true

AP = PC

BP = PD

BC = BP + PC

Circle theorem includes the concept of tangents, sectors, angles, the chord of a circle and proofs. A circle is the locus of all points in a plane which are equidistant from a fixed point.

Given the following parameters

AP = 3.5,

PD = 6,

PC = 4

According to the expression above;

BP = PD = 6

BC =  BP + PC

BC = 6 + 4

BC = 10
Hence the measure of the length BP and BC are 6 and 10 respectively

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suppose you are performing an experiment where you randomly assign people to one of three experimental conditions

Answers

The analysis which would be most appropriate for randomly assign people to one of three experimental conditions (Treatment A, Treatment B, Control) are-

ANOVAthe general linear modelWhat is ANOVA?

A statistical test called an analysis of variance, or ANOVA, is used to compare the means of more than two groups.

One independent variable is used in a one-way ANOVA, while two independent variables are used in a two-way ANOVA.A statistical technique called analysis of variance, or ANOVA, divides observed variance data into various components for use in further testing. When there are three or more data groups, a one-way ANOVA is used to find out how the dependent and independent variables are related.What is general linear model?

A helpful framework for analysing how various variables affect various continuous variables is the general linear model (GLM).

GLM generalises the ANOVA's linear model by enabling any other kind of resual distribution id(and optimises the likelihood function, which only allows a t-test based on an estimated error of the coefficients). An GLM is therefore an ANOVA, but a GLM is not exclusively a GLM.

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The complete question is -

Suppose you are performing an experiment where you randomly assign people to one of three experimental conditions (Treatment A, Treatment B, Control). Which analysis would be most appropriate?

this is confusing me please helpppp

Answers

Answer:

base = 12 cm , altitude = 16 cm

Step-by-step explanation:

the area (A) of a triangle is calculated as

A = [tex]\frac{1}{2}[/tex] ba ( b is the base and a the altitude )

here a = b + 4 , then

[tex]\frac{1}{2}[/tex] b(b + 4) = 96 ( multiply both sides by 2 to clear the fraction )

b(b + 4) = 192

b² + 4b = 192 ( subtract 192 from both sides )

b² + 4b - 192 = 0 ← in standard quadratic form

(b + 16)(b - 12) = 0 ← in factored form

equate each factor to zero and solve for b

b + 16 = 0 ⇒ b = - 16

b - 12 = 0 ⇒ b = 12

however, b > 0 then b = 12

so base = 12 cm and altitude = b + 4 = 12 + 4 = 16 cm

Answer:

base = 12 cm

Altitude = 16 cm

Step-by-step explanation:

Area of the triangle:

        [tex]\sf \boxed{Area \ of \ triangle = \dfrac{1}{2}*base*height}[/tex]

base = x cm

altitude or height = (x + 4) cm

[tex]\sf \dfrac{1}{2}*x*(x+4) = 96\\\\[/tex]

x * (x + 4) = 96*2

x*x + x*4 = 192

x² + 4x   = 192

x² + 4x - 192 = 0

Sum = 4

Product = -192

Factors =  (-12) , 16

When we add (-12) & 16, we get 4. When we multiply (-12) & 16, we get (-192).

Rewrite the middle term using the factors.

x² + 16x - 12x - 192 = 0

x(x + 16) -12(x + 16) = 0

(x + 16)(x - 12) = 0

x - 12 = 0     or x + 16 = 0

x = 12             or x = -16

Ignore x = -16 as measurements won't be in negative value.

x = 12

Base = 12 cm

Altitude = 12 + 4 = 16 cm

 

Write an equation of the line that passes through (-1,3) and has a slope of 2.​

Answers

Answer: y = -2x + 1.

Step-by-step explanation:

From (-1, 3) follow the line to go 1 to the right and 2 down (because the slope is -2). That takes you to (0, 1). So the y-intercept is 1 and the equation is y = -2x + 1.

Look at the rectangle and the square:

A rectangle PQRS and square LMNO are drawn side by side. The length SR of the rectangle is labeled as 14 inches, and the width QR is labeled as 7 inches. The side LM of the square is labeled as 7 inches.

Anna says that the length of diagonal SQ is two times the length of diagonal OM.

Is Anna correct? Justify your answer and show all your work. Your work should state the theorem you used to find the lengths of the diagonals.

Answers

Answer:

Incorrect

Step-by-step explanation:

Formula:

the Diagonal of a square with side square of lengths a

is equal to a√2.

=============

Then

Diagonal of LMNO : 7√2

Then

OM = 7√2

…………………………………………

Using the Pythagorean theorem:

The diagonal of the rectangle PQRS is equal to :

√(14²+7²) = √245 = 7√5

Then

SQ = 7√5

………………

Conclusion:

7√5 ≠ 2×(7√2)

Therefore

Anna is not correct.

Write an equation of the line that passes through the point (8, 1) with slope 5. A. y - 1 = 5(x − 8) B. y − 1 = - -5(x − 8) - C. y - 8 = -5(x - 1) OD. y - 8 = 5(x − 1) Question Progress​

Answers

Answer:

[tex]y-1=5(x-8)[/tex]

please help me !! due today:(

Answers

Answer:

[tex]\huge\boxed{\sf x = 65 \textdegree}[/tex]

Step-by-step explanation:

Using trigonometric ratio cos.

Here,

Theta = θ = xAdjacent = 12Hypotenuse = 28Finding x:

[tex]\displaystyle cos \theta =\frac{adjacent}{hypotenuse} \\\\cos \ x =\frac{12}{28} \\\\cos \ x = 0.43\\\\x = cos^{-1} 0.43\\\\x = 65 \textdegree\\\\\rule[225]{225}{2}[/tex]

Yasmin designed a square table using a scale drawing. The actual length of each side was 4 feet and the scale factor was 1 inch : 2 feet. Choose the figure with the new side length if Yasmin changed the scale factor to 1 inch : 3 and two-thirds feet.

Answers

The figure with the new side length if Yasmin changed the scale factor to 1 inch : 3 and two-thirds feet is a square with side lengths of 7 and one third feet.

How to calculate the length?

From the information given, the actual length of each side was 4 feet and the scale factor was 1 inch : 2 feet.

The new length will be:

= 2 × 3 2/3

= 7 1/3

Therefore, the new length is 7 1/3 feet.

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A polygon has the coordinates A (3, 4), B (3, 1), and C (5, 1). Identify the type of polygon

Answers

The type of polygon is a triangle

How to identify the type of polygon?

The coordinates are given as:

A (3, 4), B (3, 1), and C (5, 1).

The above shows that the number of vertices in the polygon is 3

A polygon that has 3 vertices is a triangle

Hence, the type of polygon is a triangle

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The table shows the total cost to use Mark's Moving Company.HoursTotalCost1$1902$2803$3704$460Using f(x) to represent the total cost, and x to represent the number of hours, which function models this situation?A. f(x) = 190x + 90B. f(x) = 100x + 90C. f(x) = 90x + 190D. f(x) = 90x + 100 Within the combat units, what happened to social norms related to race. Please help me out thank you. Evaluate the expression when a = 4, b = 15, and c = 16. a+c will give brainliest America is a "melting pot" with people from a diverse assortment of backgrounds, cultures, and religions and who speak many different languages. What dilemmas could this cause in health care? What skills are necessary for healthcare professionals to work with and treat a diverse array of people? Do you have those skills? If not, what will you have to do to acquire those skills? Combine like terms(3x^210x+4)+(10x^25x+8)I will give brainliest PART A: Which statement best describes the relationship between the use of OxyContin andheroin? what is the correct meaning for gulp simplify: 5(3x-4)-6(2x+3) What is true of experimental designs that are used in scientific research? The designs use the same steps in every kind of research. The designs follow a general method that is familiar to all scientists. The designs ensure that the experimental data supports the hypothesis. The designs are kept secret so that others must do their own experiments.. The answer is B.) "The designs follow a general method that is familiar to all scientists." The angle between the incident ray and the reflected ray from a mirror is 720.Find the angle of incidence. Identify the inequality graphed on the number line. A) x - 8 < 3 B) x + 8 < 3 C) x - 8 < -3 D) x + 8 < -3 1) How is nondisjunction related to Down syndrome and other abnormal chromosome numbers?2) State the differences between DNA and RNAPleaaseeee helllpppp :((( Which of the following most directly changed the legal status of African Americans established by the Supreme Courts Dred Scott v. Sandford case? A.) Emancipation Proclamation (1862) B.) Thirteenth Amendment (1865) C.) Fourteenth Amendment (1868) D.) Fifteenth Amendment (1870) ctionThe lack of education, experience, and skill Taffected African Americans duringReconstruction by Which phrase from the sentence contains an infinitive diferencias entre la forma de vida de los personajes de Bandolera yla de los espaoles de la actualidad what is (9m)4 without exponents explain the message of the cartoon (please help) Select the correct answer.Which role would a youth hired in the food industry be able to perform?O A.managing the cash registerOB. overseeing food safetyOC. performing sanitationOD.hazardous jobs like frying