Solve the following system by substitution. 7x + 2y = 16 –21x – 6y = 24 What is the solution ?

Answers

Answer 1

Answer:

no solution

Step-by-step explanation:

x=(16-2y)/7

-21*(16-2y)/7-6y=24

-3(16-2y)-6y

-48+6y-6y=24

-48=24

you can't solve for the variables

Answer 2

There is no solution for given system of equations.

System of equations :

The given equations are,

                      [tex]7x+2y=16\\\\x=\frac{16-2y}{7}[/tex]

Another equation is, [tex]-21x-6y=24[/tex]

Substitute value of x in above equation.

               [tex]-21(\frac{16-2y}{7} )-6y=24\\\\-48+6y-6y=24\\\\-48\neq 24[/tex]

Thus, there is no solution for given system of equations.

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Related Questions

Jeremy performs the same operations on 4 values for x. He records each resulting y-value in a table, which equation shows the operation Jeremy performs on x to get to y?

x: 2,4,6,8
y:5,13,21,29

Answers: y= 2x+1 , y= 4x-3 , y= x+3 , y= 3x-1

Answers

Answer:

y= 2x+1

Step-by-step explanation:

BRAINLEST ANSWER!! please show the steps

4 (2x-7) +4 > -88

Answers

Step-by-step explanation:

4(2x-7)+4>-88

4(2x-7)>-92    Subtract 4 from both sides

8x-27>-92     Distributive property

8x>-65      Add 4 to both sides

-8x<65    I call this the negative switch, but it is called something else

x<-8.125

Can someone help please?

Answers

Answer:

just substitute the numbers for the variable y, and see whichs are greater than or less than 6

Answer:

1

Step-by-step explanation:

13 - 7(-1) = 20 so no

13 - 7(0) = 13 so no

13 - 7(1) = 6 so yes

[is there a 2 there?] 13 - 7(2) = -1 so no

13 - 7(3) = -8 so no

what is the greatest common factor shared by 51 and 21

Answers

The number ir gcf is 3 !

Anyone know how to do??

Answers

Answer:

x = 15°

Step-by-step explanation:

∠2 and ∠4 are same-side interior angles, meaning they add up to 180

2x + 10 + 4x + 80 = 180

Rearrange (collect like terms)

6x = 180 - 80 - 10

6x = 90

x = 15°

Answer:

x = 15

Step-by-step explanation:

∠2 = 2x + 10

∠4 = 4x + 80

∠2 and ∠4 are supplementary angles, this mean ∠2 + ∠4 = 180

2x + 10 + 4x + 80 = 180

combine similar terms: 6x = 180 - 80 - 10

simplify: 6x = 90

solve for x = 90 / 6

               x = 15

Find the height of an equilateral triangle with sides 12 cm long.

Answers

Answer:

12cm

Step-by-step explanation:

Since it is an equilateral triangle, meaning that all sides are equal the height is 12 cm.

can you name some of the respectful disagreement skills​

Answers

Answer: Listen to what the other person has to say, try to see from other perspectives, don't show anger or other person won't listen to what you have to say.

Step-by-step explanation:

Answer:

no sorry

Step-by-step explanation:

John and Jane went to a bakery to get cookies for a party. Jane bought x cookies that were $3 each. John bought x cookies that were on sale for $1 plus he got a small cake for $10.00. How much did John and Jane each spend, if they spent the same amount of money?​

Answers

Answer:

They spent $15.

Step-by-step explanation:

It's given that Jane bought x cookies, so 3x.

John spent $1 on each of the x cookies he got, and also an extra $10, so x+10.

3x=x+10

2x=10

x=5

So they got 5 cookies each.

5 cookies x $3= $15 (check with $5(1)+$10= $5+$10= $15 )

find the domain and range of the function represented by the graph.

Answers

The answers are B and D

Liam rented a pedal board for 5.5 hours and paid a total of $93.75. What is an equation in point-slope form that
models the cost of renting a pedal board for x hours? How can Liam use the equation to find the one-time service
charge?

Answers

Answer: if y is the total cost of the rental, then y-93.75=12.5(x-5.5) models the cost of renting a pedal board for x hours. liam should rewrite the equation from the previous step so that y is isolated on one side. the constant on the other side is then the service fee.

Step-by-step explanation:

yeah that’s all

The point-slope form equation is an equation that has a slope "m" and passes through a point or two points.

The equation to find the one-time service charge is 93.75 = 17.05x + b

The point-slope form equation is written as:

y = mx + b

Where

m = gradient

b = slope of the line

Liam rented a pedalboard for 5.5 hours and paid a total of $93.75.

Therefore, the cost of renting a pedalboard for 1 hour

= $93.75/5.5

= $17.05

a) An equation in a point-slope form that  models the cost of renting a pedal board for x hours is written as:

y = mx + b

Where

y = Total charge = $93.75

m = Cost of renting a pedalboard per hour = $17.05

x = Number of hours for renting a pedal board

Hence, the equation is given as:

93.75 = 17.05x

b)The equation to find the one-time service charge where the service charge is b is given as

Hence, the equation is given as:

93.75 = 17.05x + b

Where b = service charge

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Solve 14m = 98
A. M=7
B. M=112
C. M= 84
D. M=8

Answers

Answer:

A) m=7

Step-by-step explanation:

Just divide 98 by 14

Answer:

A is the answer

Step-by-step explanation:

7×14 = 98

Find the equation of line b described below, in slope-intercept form

Line a is perpendicular to line b
Line a passes through the points (1,-8) and (9,-12)
Line b passes through the point (-8, -16)
The equation of line b is y= ______

Answers

Given:

Line a is perpendicular to line b .

Line a passes through the points (1,-8) and (9,-12) .

Line b passes through the point (-8, -16).

To find:

The equation of b.

Solution:

Line a passes through the points (1,-8) and (9,-12) . So, slope of line a is

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m_a=\dfrac{-12-(-8)}{9-1}[/tex]

[tex]m_a=\dfrac{-12+8}{8}[/tex]

[tex]m_a=\dfrac{-4}{8}[/tex]

[tex]m_a=-\dfrac{1}{2}[/tex]

Product of slopes of two perpendicular lines is -1.

[tex]m_a\times a_b=-1[/tex]

[tex]-\dfrac{1}{2}\times a_b=-1[/tex]

[tex]b=2[/tex]

Slope of line b is 2.

If a line passing through a point [tex](x_1,y_1)[/tex] with slope m, then equation of line is

[tex]y-y_1=m(x-x_1)[/tex]

Line b passing through (-8,-16) with slope 2. So, equation of line b is

[tex]y-(-16)=2(x-(-8))[/tex]

[tex]y+16=2(x+8)[/tex]

[tex]y+16=2x+16[/tex]

Subtract 16  from both sides.

[tex]y=2x[/tex]

Therefore, the equation of line b is [tex]y=2x[/tex].

During the 2010 Great Backyard Bird Count, an average of
42 bald eagles were counted in each of 20 locations throughout
Alaska. In 2009, an average of 32 bald eagles were counted in
each of 26 locations throughout Alaska. Based on this data, how
many more bald eagles were counted in 2010 than in 2009?
Use the graphic organizer to help you solve the problem.

Answers

Answer:

good luck

Step-by-step explanation:

what is an explicit representation for the nth term of the sequence (-1/2, -2 , - 8, -32)​

Answers

Answer:

sdvsvsdv

Step-by-step explanation:

Answer:

Step-by-step explanation:

It’s B

I What are the subsets of dog cat fish

Answers

Answer:

Mammals

Step-by-step explanation:

these vertebrates are considered mammals

Answer:

Subsets of {dog, cat, fish} are Ф, {dog}, {cat}, {fish}, {dog, cat}, {dog, fish}, {cat, fish}, {dog, cat, fish}

if that doesn't work do

4 - Practice: Working with Sets Practice

1. D

2. B

3. A

4. C

5. A

6. C

7. C

8. D

9. C

10. B

-cc

hope this helped please mark me brainliest!

If you can fit 50 people into one bus, how many buses would you need to transport 940 people? Show your work.

Answers

Answer: 19

Step 1: Divide.

940 ÷ 50 = 18.8

Step 2: Round 18.8 to the nearest one.

18.8 - 19

Answer to the question is 19.

Answer:

About 19 buses

Step-by-step explanation:

940/50 = 18.8 ≈ 19

Simplify each of the expressions.

Answers

Answer:

5y2 + -3y + 2

Step-by-step explanation:

Sorry only have the first one.

Renting video games from Store S cost $2.50 per game plus a monthly fee of $5. Renting video games from Store T cost $5 per game with no monthly fee. The monthly cost to rent video games depends on the number of video games, v, rented. What inequality represents the situation when the monthly cost of Store S is less than the monthly cost at Store T?

Answers

Answer:2.5v+5>5v

Step-by-step explanation:this definitely right

The slope of this graph is?

Answers

the slope of the graph is -1/2 using the rise over run method it rises up one and too the left twice so it would he -1/2
The equation of the graph is y=-0.4x + 1, therefore the slope is -0.4

Evaluate each of the following expressions if x=5, y=6, z=-6

X+3y+z=____
(x-12)+3(y+z)=____
100x+yz=___

Answers

1x3 is 3 thats quick maths

True of False?
2) A fraction can multiply with another fraction​

Answers

Answer:

True.

Step-by-step explanation:

Hope this helps!

Answer:

TRUE!!

Step-by-step explanation:

Good luck

Find the slope of the line passing through each of the following pairs of points.
(0, −8), (0, 4)

Answers

Answer:

Undefined.

Step-by-step explanation:

[tex]m=\frac{rise}{run}=\frac{4+8}{0-0}=\frac{12}{0}= undefined[/tex]

The slope is undefined.

Hope this helps.

Answer:

Undefined( If this is wrong then it is zero)

Step-by-step explanation:

The formula for this problem is y2 - y1/x2-x1. You can name any of those points 1 or 2 as long as they have the right coordinate.

4 - (-8)/0 - 0= 12/0 = Undefined

A line passes through the points (3, 5) and (2, 0). What is the slope?

Answers

Answer:

y= -4x - 5

Step-by-step explanation:

5 is your y-intercept

The slope of the line which passes through the points (3,5) and (2,0) is 5

From the question,

We are to determine the slope of the line

The slope of a line with two given points can be determined from the formula

[tex]m = \frac{y_{2}-y_{1} }{x_{2}-x_{1}}[/tex]

Where m represents the slope

From the given information

x₁ = 3

y₁ = 5

x₂ = 2

y₂ = 0

Putting these into the formula,

We get

[tex]m = \frac{0-5}{2-3}[/tex]

Then,

[tex]m = \frac{-5}{-1}[/tex]

∴ m = 5

Hence, the slope of the line which passes through the points (3,5) and (2,0) is 5

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A bag of flour weights 5 pounds . There are 420 grams in 1 pound . How many grams of flours are in the bags ?

Answers

Answer:

2100

Step-by-step explanation:

Answer:

2100 grams

Step-by-step explanation:

Just multiply 5 with 450.

Help help help help help help help help help help

Answers

I am not really sure, but I can say that I would go with; either B or C.  Sorry...

Line JK passes through points J(–4, –5) and K(–6, 3). If the equation of the line is written in slope-intercept form, y = mx + b, what is the value of b?

–21
–4
11
27

Answers

Find the slope that passes between the points.

(y₂ - y₁) / (x₂ - x₁)

J(-4, -5)

K(-6, 3)

(3 - (-5)) / (-6 - (-4))

(3 + 5) / (-6 + 4)

8 / -2

-4

Now slap that slope into the formula and substitute on of the coordinates to the formula to solve for b (I'll take point K's coordinate):

y = mx + b

y = -4x + b

3 = -4(-6) + b

3 = 24 + b

3 - 24 = b

- 21 = b

b = -21

If the equation of the line is written in slope-intercept form, y = mx + b, then the value of b is -21 and is denoted as option A.

What is Slope?

This is also referred to as the gradient of a line and measures its steepness and direction.

Slope = (y₂ - y₁) / (x₂ - x₁)

Parameters

J(-4, -5) and K(-6, 3)

= (3 - (-5)) / (-6 - (-4))

= (3 + 5) / (-6 + 4)

= 8 / -2

= -4

Substitute one of the coordinates into the formula to solve for b

y = mx + b

y = -4x + b

3 = -4(-6) + b

3 = 24 + b

3 - 24 = b

b = - 21

Read more about Slope of a line here https://brainly.com/question/20848

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Help quick The engineers designing the All Aboard Railroad between Boca Raton and Jupiter decide to create parallel tracks through this portion of the railway. To illustrate their plans to the county commission, they use a coordinate plane. The southbound track will have an equation of 2x + 5y = 15. What is the equation of the parallel northbound track that runs through the point (4, – 2)?




A. 2x + 5y = −2


B. 2x − 5y = 18


C. 5x + 2y = 16


D. 5x − 2y = 24

Answers

Answer:

Step-by-step explanation:

The answers is A

The required equation of the parallel track that runs through the point (4 , -2) is  2x + 5y = −2.

The engineers designing the All Aboard Railroad between Boca Raton and Jupiter decided to create parallel tracks through this portion of the railway.The southbound track will have an equation of 2x + 5y = 15. What is the equation of the parallel northbound track that runs through the point (4, – 2) TO determine.

What is the equation?

The equation is the relationship between variables and represented as y=ax + b  is an example of a polynomial equation.

Equation of the southbound track,
2x + 5y = 15
slope of the above equation is m = -2/5

Since the slope of the parallel lines are equal.

The equation of the parallel northbound track that runs through the point (4, – 2),
(y + 2) = -2/5 (x - 4)
5(y + 2) = -2 (x-4)
5y + 10 = - 2x +8
2x + 5y = 8-10
2x + 5y = -2

Thus, the required equation  of the parallel track that runs through the point (4 , -2) is  2x + 5y = −2.

Learn more about the equation here:

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Find the vertex and y-intercept of the quadratic function.
y = - x2 + 4x + 7

Answers

Answer:

Vertex: (2, 11)

Y-Intercept: (0, 7)

Step-by-step explanation:

four a​ number, increased by one ​, is between seven and thirteen .

Answers

I don’t know what you mean by “four a number”. Please make sure there are no severe grammatical issues with your questions

4(2x - 2) + 2 = 4(x - 2)

Answers

Answer:

X=-1/2

Step-by-step explanation:

Hope this helps. Plz give brainliest.

Answer:

x = -1/2 or -0.5

Step-by-step explanation:

4(2x - 2) + 2 = 4(x - 2)

open the parenthesis

8x - 8 + 2 = 4x - 8

add 8 to both sides of the equation

8x - 8 + 2 + 8 = 4x - 8 + 8

combine like terms

8x + 2 = 4x

subtract 4x from both sides of the equation

8x - 4x + 2 = 0

4x + 2 = 0

subtract 2 from both sides of the equation

4x + 2 - 2 = 0 -2

4x = -2

divide both sides by 4

4x/4 = -2/4

x = -1/2

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