Solve each system by elimination.
x + y = 12 , x - y = 2

Answers

Answer 1

By elimination, the solution of the system of equations, x + y = 12 and x - y = 2, is (7 , 5).

A system of equations is a set of two or more equations which includes common variables. To solve system of equations, we must find the value of the unknown variables used in the equations that must satisfy all the equations.

There are three methods that can be used to solve system of equations.

1. Elimination

2. Substitution

3. Graphing

Using the elimination method, given two equations in x and y, a variable should be eliminated by adding/subtracting the two equations.

Adding the two equations will eliminate the variable y.

x + y = 12     (equation 1)

x  - y = 2    (equation 2)

2x + 0y = 14

x = 7

Substitute the value of x to any of the two equation and solve for y.

x + y = 12     (equation 1)

7 + y = 12

y = 12 - 7

y = 5

Hence, the solution of the system of equations is (7 , 5).

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Solve Each System By Elimination.x + Y = 12 , X - Y = 2

Related Questions

MARKS BEST TO WHOEVER ANSWERS FIRST!!!!!!!!!!!!!!!!!!

Answers

The sequence of the angles from least to biggest is ∠WXY < ∠YXZ < ∠WYX < ∠XZY < ∠XYZ.

What is the triangle?

A triangular is a geometry with 3 sides and three angles. The triangle has angles that sum up to 180 °.

In a triangle, if the angle is small then the opposite side will be short, and if the angle increases then the side also increases.

The sides of the triangle are in ascending order, then we have

WY < YZ < WX < XY < XZ

Then the sequence of the angles is given as,

∠WXY < ∠YXZ < ∠WYX < ∠XZY < ∠XYZ

The sequence of the angles from least to biggest is ∠WXY < ∠YXZ < ∠WYX < ∠XZY < ∠XYZ.

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can sb pls help miiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Answers

Answer: help is to make it easier for (someone) to do something by offering one's services or resources.

"they helped her with domestic chores"

Step-by-step explanation: hope this helps

The gravitational attraction between two bodies varies inversely as the square of the distance between them: If the force of attraction is 64 pounds when the distance between the bodies is 9 feet, what is the distance between them when the force is 36 pounds?

Answers

The distance between them when the force is 36 pounds is 5.06 feet.

According to the statement

We have to find that the distance between two bodies.

So, For this purpose, we know that the

A force is a push or pull upon an object resulting from the object's interaction with another object.

From the given information:

If the force of attraction is 64 pounds when the distance between the bodies is 9 feet

Then

F1 =64 pounds, r1 = 9 ft

F2 = 36 , r2 = ?

The gravitational force of attraction is inversely proportional to the square of distance between the two bodies.

So, F2 / F1 = r1^2 / r2^2

36 / 64 = 9 / r2

r2 = 0.56*9

r2 = 5.06.

So, The distance between them when the force is 36 pounds is 5.06 feet.

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Answer:

12 ft

Step-by-step explanation:

there is less force so the distance is greater

whos good at algebra bc...

Answers

[tex]\displaystyle\\Answer:\ y=-\frac{1}{3} x+5[/tex]

Step-by-step explanation:

Choose two points that belong to this graph: (0,5)  (3,4)

                    Formula for a straight line:

                            [tex]\displaystyle\\\boxed{\frac{x-x_1}{x_2-x_1}=\frac{y-y_1}{y_2-y_1} }[/tex]

[tex]\displaystyle\\x_1=0\ \ \ \ \ x_2=3\ \ \ \ \ y_1=5\ \ \ \ \ y_2=4\\\frac{x-0}{3-0} =\frac{y-5}{4-5} \\\\\frac{x}{3}=\frac{y-5}{-1}[/tex]

Multiply both parts of the equation by -1:

[tex]\displaystyle\\-\frac{x}{3}=y-5\\\\ -\frac{x}{3} +5=y-5+5\\\\-\frac{x}{3}+5=y\\\\y=-\frac{1}{3}x+5[/tex]

Alisa has 10 yellow cars, 7 green cars, 5 red cars, 9 purple cars, 11 blue cars, 26 brown cars, and 44 black cars. How much cars does Alisa have?

Answers

Answer:

107 cars

Step-by-step explanation:

Answer:

107 cars

Step-by-step explanation:

10+7+5+9+11+26+44=107


EXTENDED RESPONSE Triangle A B C has vertices A(-3,-5), B(-1,-1) , and C(-1,-5) ,
Triangle X Y Z has vertices X(5,-5), Y(3,-1) , and Z(3,-5) ,
c. Write a logical argument using coordinate geometry to support your conjecture.

Answers

The corresponding sides have the same measure and are congruent. So,  ΔABC ≅ ΔXYZ by SSS.

What in mathematics is the Pythagoras Theorem?

According to the Pythagoras theorem, the square of the hypotenuse of a right-angled triangle equals the sum of the squares of the other two sides. The formula for this theorem is c2 = a2 + b2, where c is the hypotenuse and a and b are the triangle's two legs.

Observe the graph, the triangles are right triangles. In triangle ABC, AC = 2 and BC = 4. Use the Pythagorean

Theorem to find AB.

AB² = AC² + BC²

AB = √ AC² + BC²

AB = √ 2² + 4²

AB = √4 + 16

AB = √20

Similarly In triangle XYZ, ZX = 2 and ZY = 4. Use the Pythagorean Theorem to find XY

XY² = XZ² +  ZY²

XY = √ XZ² + ZY²

XY = √ 2² + 4²

XY = √4 + 16

XY =  √20

The corresponding sides have the same measure and are congruent. So,  ΔABC ≅ ΔXYZ by SSS.

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A football team needs to sell at least 20,000 tickets to two games to cover expenses. They sell 10,184 tickets to one game and 9,723 tickets to the other. Estimate by rounding to the nearest thousand and by rounding to the nearest hundred. Did the team sell enough tickets?

Answers

The answer is 19,907 which rounds to 20,000 if you were to round to the nearest hundred


Evaluate each expression for a=3 and b=-5 . b(2 b-a)

Answers

Evaluating the expression b(2b - a) for a = 3 and b = -5 is equal to 65.

An algebraic expression is a number, variable, or the combination of both and operational symbols. On the other hand, an equation is the equality of two expressions separated by "=".

To evaluate an expression or an equation means to substitute a value to the variable and perform the arithmetic operations included.

Given the expression b(2b - a), substitute the value of the variable a and the value of variable b.

b(2b - a)

-5[2(-5) - (3)]

Performing the arithmetic operations, we can have the value of the expression.

-5[2(-5) - (3)]

= -5(-10 - 3)

= -5(-13)

= 65

Hence, the expression b(2b - a) when a = 3 and b = -5 is equal to 65.

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Select the reason that best supports Statement 5 in the given proof.

Answers

A={x|x is an even number more than 0 but less than 5}

Tell whether each equation is in slope-intercept, point-slope, or standard form.

d. y-3=4 x

Answers

y-3=4 x is in point-slope form, it is neither in slope-intercept form nor standard form.

What is a slope of line?

A line's steepness and direction are determined by the slope of the line. Without actually using a compass, determining a line's slope in a coordinate plane allows one to anticipate whether a line is parallel, perpendicular, or not.

The change in a line's y coordinate relative to its change in x coordinate is referred to as the line's slope. Δy is the net change in the y coordinate, while Δx is the net change in the x coordinate.  

Therefore,

m =  y₂-y₁/x₂-x₁ (where m denotes the slope) can be used to express how the y coordinate changes in relation to the x coordinate.

Be aware that tan ∅ = y/x

We also refer to this tan as the line's slope

We know that  point-slope form = y₂ - y₁ = m(x₂ - x₁)

the equation looks like this in point-slope form ⇒ y-2= 4(x-0)

Here, the points are (x, y) and the points the line is passing through is

(0, 2)

y-2= 4(x-0) is in point-slope form, it is neither in slope-intercept form nor  standard form.

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A football field is about 100 m long.
One of the players can run the full
distance in 25 seconds. How fast was
the player running?

Answers

Answer:

The player is running about 4 yards a second

Step-by-step explanation:

Answer:

2.5m a second

Step-by-step explanation:


Find the slope and y -intercept of each line.. y=0.4-0.8 x

Answers

The slope of the given equation of the line is -0.8 and the y-intercept = 0.4.

What is the equation of a line to the curve?A line's equation has the standard form ax + by + c = 0. Here, the variables are x and y, the coefficients are a and b, and the constant term is c. It is a first-order equation with the variables x and y. The coordinates of the point on the line shown in the coordinate plane are represented by the values of x and y.

Given: y = -0.8x + 0.4

As we know that the slop-intercept form of the equation of a line is given by: y = mx + c, where

m = slope of the linec = y-intercept of the line

On comparing the given equation of line with the above form of equation of line, we get: m = -0.8 and c = 0.4.

Hence, The slope of the given equation of the line is -0.8 and the y-intercept = 0.4.

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Three angles fit around a .2 of the angles are 115° and 53° work out the size of the third angle which of the word below describes the third angle right angle obtuse angle reflex angle or acute angle

Answers

Three angles fit around a point, two of the angles are 115° and 53° , then the size of third angle would be 192° and it would be a reflex angle.

The sum of the angles around a point is 360 °

If the two angles are 115° and 53° , the sum of the two angles would be 168°

If we reduce the sum of the two angles from the total 360° , we get the size of third angle as 192°

As the size of third angle is more than 180° , so the name of the third angle is reflex angle because right angle is measured 90° , obtuse angle is measured more than 90° but less than 180° , reflex angle is measured more than 180° but less than 360° and acute angle is measured less than 90 °

Correct question is - Three angles fit around a point. Two of the angles are 115° and 53° . Work out the size of third angle and which of the words below describe the third angle

• Right angle

• Obtuse angle

• Reflex angle

• Acute angle

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help asap please this is timed please make sure your answer is correct

Answers

The expression that best represent the given statement is mn + p. The correct option is B. mn + p

Writing an expression

From the question, we are to determine the expression that represents the given statement

The given statement is

"the product of quantities m and n increased by p"

The product of m and n can be written as,

m × n = mn

Increased by p means, p was added to the expression.

Thus,

The statement, the product of quantities m and n becomes

mn + p

Hence, the expression that best represent the given statement is mn + p. The correct option is B. mn + p

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Determine a series of transformations that would map Figure B onto figure C

Answers

The words that complete the drop down menus are

RotationTranslation

This is further explained below.

What is Translation?

In geometry, a translation is a transformation that involves moving every point in a figure, shape, or space by the same distance in a specific direction.

A translation may either be seen as the addition of a constant vector to each point or as the movement of the origin of the coordinate system. Both of these interpretations are valid.

Generally,  You need to turn the ship such that all of the sides are aligned parallel to one another.

Move the vertices around in the shape until they are aligned properly.

The rotation should be somewhere about ninety degrees, and the translation should move the form up in a diagonal direction.

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130 2/3 divided by 10 1/2

Answers

Answer:

12.44 repeated

Step-by-step explanation:

Answer:

112/9

12.4

12 4/9

!!! HELP QUICKLY PLEASE !!! !!! 100 POINTS TOTAL !!!
On Marshal’s 5th grade math test, he was asked to evaluate: 25,328.941 ÷ 104. The answer he wrote was 25.328941. Unfortunately for Marshal, his teacher marked this answer as incorrect. Explain the mistake Marshal made. What is the correct solution to 25,328.941 ÷ 104?

Answers

The mistakes Marshal made. He forget to divide the number last time by 10

25,328.941 ÷ 10^4

The division is the inverse of multiplication. When you divide a number by 10, each digit moves one place to the right to make it 10 times smaller.

=25,328.941 /10*10*10*10

= 25,32.8941 /10*10*10

= 25,3.28941 /10*10

= 25.28941 /10

= 2.528941

25,328.941 ÷ 104. The answer he wrote was 25.328941 written by a teacher

He forget to divide the number last time by 10

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What are the intercepts of y=4x-2

Answers

Answer:

x intercept (0.5,0) & y intercept (0,-2)

Step-by-step explanation:

Sep 22, 7:30:49 PM
Watch help video
Express the interval using inequality notation.
[5,♾)

Answers

According to the question, the given inequality interval expression can be represented is as follows:

In the expression of interval that is [5,♾). The left hand side contain square brackets and the right side bracket contains infinity.

Therefore, the interval contains the numbers which tells the starting point and the endpoint. In this, the interval starts from the point 5 and it takes infinite values on the line graph.

What is interval?

Interval contains all the numbers between the two given number in the intervals. The two numbers represent the starting coordinate point and the endpoint. There are different ways to show intervals. Some of the ways are inequality, number line, etc.

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is 2^2 equals to -2^2

Answers

Answer:

Yes, 2² = -2².

Step-by-step explanation:

Given that,

→ prove that 2² equals to -2².

Let's prove the equation,

→ 2² = -2²

→ 4 = 4

→ [ LHS = RHS ]

Hence, it is proved to be equal.

2^2 is
2*2
Which is 4
Because a positive times a positive equals a positive.
-2*-2 is
Which is 4
Because a negative times a negative equals a positive.
Both equal to positive four.
Thus, yes.

Hope this helps.

Solve this pls (pls)

Answers

Answer:

21-3= 18 18 +18=36 36/6 =6

Step-by-step explanation:

correct 36/6=6

Answer:

This problem is not solvable. So, the correct answer is 21 – 3 + 18 ÷ 6 = 6

Step-by-step explanation:

21 – 3 + 18 ÷ 6 = 6

Hope this still helps! Have an amazing day! Please award me brainliest! :)


Draw the two planes determined by the following equations:
2x+3y-z=12
2x-4y+z=8

Answers

Both the planes of the given equations,

2x+3y-z=12 (1)

2x-4y+z=8 (2)

They have been drawn in a three-dimensional plane, and the images are attached below.

Which expressions are equivalent to -6(b+2)+8−6(b+2)+8minus, 6, left parenthesis, b, plus, 2, right parenthesis, plus, 8 ?

Answers

The equivalent expression of -6(b + 2) + 8 is -6b - 4

How to determine the equivalent expression?

The expression is given as

-6(b + 2) + 8

Expand

-6b - 12 + 8

Evaluate the like terms

-6b - 4

Hence, the equivalent expression of -6(b + 2) + 8 is -6b - 4

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Dominic is working two summer jobs, making $10 per hour babysitting and making $6 per hour walking dogs. In a given week, he can work no more than 16 total hours and must earn at least $120. If x represents the number of hours babysitting and y represents the number of hours walking dogs, write and solve a system of inequalities graphically and determine one possible solution.

Answers

The system of inequalities for this problem is given by:

x + y ≤ 16.10x + 6y ≥ 120.

The graphical solution is given at the end of the answer, and one possible solution is 12 hours babysitting and 3 hours walking the dog.

What is a system of inequalities?

A system of equations is when two or more variables are related, and inequalities are built to find the values of each variable.

For this problem, the variables are given as follows:

Variable x: number of hours babysitting.Variably y: number of hours walking dogs.

He can work no more than 16 total hours, hence:

x + y ≤ 16.

He must earn at least $120, hence, considering the earnings with each activity:

10x + 6y ≥ 120.

These two inequalities compose the system. The graphical solution is composed by points that:

Are to the left of line y = 16 - x.Are to the right of line -1.67x + 20.Above y = 0, as there are no negative times.

The graphical solution is given by the region shaded in blue at the end of the answer.

One possible solution inside the region is:

(12,3).

Meaning that he can work 12 hours babysitting and 3 hours walking the dog.

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EASY POINTS WILL GIVE BRAINLIST TO BEST ANSWER
see image!

Answers

10 miles in 30 minutes would mean Julia was riding at 20mph.

5 miles in 12 minutes would mean Alex was riding at 25mph which means Alex would've had the greater average speed.

miles per hour is a good measure for this scenario because a hour is 60 minutes and the numbers 12 and 30 go into 60 cleanly.

12*5=60

30*2=60

60 minutes=1 hour


Solve each system by substitution.
5m - n = 7 , 3 + 3n = 6m

Answers

Using substitution method, the solution of the given system of equations is (2,3)

A system of equation can be solved using:

graphical methodsubstitution methodelimination method

The given system of equations:

5m - n = 7  ............   (1)

3 + 3n = 6m  .............. (2)

In equation (1), subtract 5m from both sides:

5m - n - 5m = 7 - 5m

-n = 7 - 5m

Multiply by (-1)

n = 5m - 7  ...... (3)

Substitute  n = 5m - 7 into equation (2)

3 + 3n = 6m

3 + 3(5m - 7) = 6m

15m -18 = 6m

9m = 18

m = 2

Substitute back m = 2 into equation (3)

n = 5m - 7

n = 5.(2) - 7 = 3

Hence, the solution is (2, 3)

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find the values of x and y

Answers

Answer:

D

Step-by-step explanation:

Similar question to the one on your quiz

Help please what would the answer beeee.

Answers

Answer:

1

Step-by-step explanation:

Answer:1

Step-by-step explanation:

Please help 8 through 10

Answers

8. The outlier is 49
(an outlier is a number that doesn’t really belong because it could be too small or too big. in this case, it’s too big)
9. The mean is 14
(you add all the numbers up and divide it by how many numbers you added with)
10. They are using mode because it is the most common number in the set. Their claim is misleading because some books are greater than 5 dollars

Please help me thanks

Answers

Answer:

a). 14 hours a week

b). 10.5 hours a week

Step-by-step explanation:

His time = 42 hours a week

Quarter of his time = one fourth of his time.

Third of his time = one third of his time

So, for dealing with complaints:

42h * 1/3 = 42h / 3 = 14h

On the phone:

42h * 1/4 = 42h / 4 = 10.5h

Answer:

a) 14 hours

b) 10.5 hours

Step-by-step explanation:

42 hours = 1 week

a) 1/3 hours a week dealing with complaints

[tex]\frac{1}{3} *\frac{42}{1} = \frac{42}{3} = 14[/tex]

He spends 14 hours a week dealing with complaints.

b) 1/4 hours a week on the phone

[tex]\frac{1}{4} * \frac{42}{1} = \frac{42}{4} = \frac{21}{2} = 10.5[/tex]

He spends 10.5 hours a week on the phone.

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