Solve the system of equations by substitution. show all the steps needed to solve.

2x+3y=19
y=9



3x+9y=42
y=2x



2x + 5y=22
x=3y




x=2y
3x + 2y=2



x+3y=11
x+4y=14

Answers

Answer 1
2x+3(9)=19
2x+27=19
-27 -27
2x=-8
2x/2=-8/2

x=-4
y=9




3x+9(2x)=42
3x+18x=42
21x=42
21x/21=42/21
x=2
y=2(2)
y=4

x=2
y=4




2(3y)+5y=22
6y+5y=22
11y=22
11y/11=22/11
y=2
x=3(2)

x=6
y=2




3(2y)+2y=2
6y+2y=2
8y=2
8y/8=2/8
y=0.25 or 1/4
x=2(0.25)
x=0.5 or 1/2

x=0.5 or 1/2
y=0.25 or 1/4




x+3y=11
-(x+4y=14)
-1y=-3
-1y/-1=-3/-1
y=3
x+3(3)=11
x+9=11
-9 -9
x=2

x=2
y=3
Answer 2
Just type all of these in Desmos graphing calculator

Related Questions

the numbers are all 3, I think

Answers

Answer:

27 cubic units

Step-by-step explanation:

Volume = length • width • height

3 • 3 • 3 = 27 (Break it down by solving 3 • 3 = 9. Then 9 • 3 = 27)

Volume of a cube = a³

= 3 x 3 x 3
= 27

Hope it helps you

Write an equation of a line that passes through the point (7, 3) and is parallel to the line y = negative 2 over 3x + 3. y = 3 over 2x − 3 y = 3 over 2x + 3 y = negative 2 over 3x + 23 over 3 y = negative 2 over 3x − 23 over 3

Answers

The equation of line parallel to y = -2/3x + 3 and passing through (7, 3) will be y = -2/3 x + 23 / 3. Then the correct option is C.

What are parallel lines?

When the distance between the lines is constant then the lines are called parallel lines. The lines do not intersect when they are separated from each other. And the slope of the lines is equal.

The equation of a line is given below.

y = -2/3 x + 3

Then the slope of the line will be

m = -2/3

Then the equation line which is having a slope of - 2/3 will be

y =  -2/3 x + c

The line is passing through (7, 3). Then we have

3 = -(2/3) (7) + c

3 = -14/3 + c

c = 3 + 14/3

c = 23/3

Then the equation will be

y = -2/3 x + 23 / 3

Then the correct option is C.

More about the parallel lines link is given below.

https://brainly.com/question/16701300

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8th grade geometry (triangles), WILL GIVE BRAINLIEST TO THE ONE WHO EXPLAINS HOW THEY CAME TO THE RIGHT ANSWER :))

thanks so much!!!!!

Answers

Answer:

It is either a or d.

Step-by-step explanation:Because even without knowing the lengths, you can tell that b+c is definitely bigger than a, and a+b is definitely bigger than c. So I guess you will just have to take your chances and guess.

It is a. A right triangle is proven to be a right triangle with its right angle. Line a and c forms the right angle. C and b are much longer than a, so it is fair to assume that their measurements are a bigger number. It can’t be b, because b + c < a doesn’t make sense as a is the smallest side and b and c are longer. C doesn’t make sense, as side b is longer than c. D doesn’t make sense as the triangle theorem states that the sum of two sides has to be greater than the longest side for it to be a triangle. This is obviously a triangle. So your final answer is a.

A surveryor wants to know how many shoppers at a mall like to read books. He surveys 100 people coming out of a bookstore at the mall.

Is this sampling method biased?

A. Yes
B. No

Answers

Yes it is biased aaaaaaaaaaaaaaaaaaaaaaaaaa
A. Yes

This sampling method is biased because the survey only asks people that are coming out of a bookstore rather than people all over the mall.

can someone help me with these problems?

Answers

same, i want the answer for the same question pls answer

1. 50x0.5= 25
2. 2000x0.75=1500

12. Convierte estas fracciones impropias en números mixtos:
A. 15/7=
B. 16/6=
C. 12/5=
D. 48/7

Por favor.

Answers

A. 2 1/7
B. 2 3/6
C. 2 2/5
D. 6 6/7
A. 2 1/7
B. 2 4/6
C. 2 2/5
D. 6 6/7

How many reflection lines are there in a rotation and how are they related?
Select the correct response:
3 intersecting lines
2 parallel lines
2 intersecting lines
2 intersecting lines that MUST be perpendicular

Answers

2 parallel lines. i hope this helps !!
There are 2 parralel lines

Nayeli light a 4m² space with 12 candles. Citlali lights a 10m² space with 30 of the same type of candles. Whos space is lit brighter? Please explain how you got your answer.

Answers

Answer:

Answer is both covered same level of brightness

sorry for bad handwriting

Both candles covered the same space by the light per candle.

What is the rate?

The rate is the ratio of the amount of something to the unit. For example - If the speed of the car is 20 km/h it means the car travels 20 km in one hour.

Nayeli light a 4m² space with 12 candles. The space covered by the light per candle is calculated as,

⇒ 4/12

⇒ 0.3333 m² per candle

Citlali lights a 10m² space with 30 of the same type of candles. The space covered by the light per candle is calculated as,

⇒ 10/30

⇒ 0.3333 m² per candle

More about the rate link is given below.

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answer all 4 for brawliest thank you

Answers

answers are listed below
1. A
2.B
3.A
4. C
1. A, 2.B, 3.A, 3.C
These should be the answers

please help What number should be placed in the box to help complete the division calculation?

Answers

Answer:

702

Step-by-step explanation:

The best way to do it is to divide 13 into 702. 13 doesn't go into 7 but it does go into 70 5 times. 70 - 65 = 5. Once you bring down the 2, 5 turns into 52 which 13 goes evenly into it 4 times. So your answer for that is 54. Then to get your number you multiply 54 with 13 and you get 702. So 702 is your answer.

It’s definitely 702!

Find the range of the following list of numbers: 16, 23, 12, 12, 20, 21, 16, 33, 21, 16.
A. 21
B.19
C.12
D. 16

Answers

add all the numbers together then divide by the amount there is so the answer is B
It’s A because 33-12 is 21

I will give u brainliest if you answer these questions

Answers

Answer:

A : 256

B : 8

I am like super unsure ngl

Step-by-step explanation:

(REMOVE THIS, my friend by accident posted this.)

The answer is 256 no problem

5 of 5
A rucksack can hold a maximum of 3 kg.
A particular textbook has a mass of 650 g.
What is the maximum number of these textbooks that the rucksack can hold?

Answers

Answer:  4 books maximum

Reason:

x = number of textbooks

650x = weight of all x books, at 650 grams each

3 kg = 3000 g

650x = 3000

x = 3000/650

x = 4.615 approximately

Round down to the nearest integer. This is because 4 textbooks weigh 4*650 = 2600 grams = 2.6 kg; while 5 textbooks weigh 5*650 = 3250 grams = 3.25 kg which is over the weight limit.

This means 4 books is the most the rucksack can hold. This is of course only when we have 4 of the same exact book.

4 books!!!!!!! Is the answe

Please Help Thank you! ^^

Answers

Answer:

406

Step-by-step explanation:

A rectangular prism has six sides, three pairs of matching ones

Start by finding the area of each of the three kinds of sides

14 x 5 = 70

5 x 7 = 35

7 x 14 = 98

Now multiply each of these answers by two, for the number of sides that have each surface area

140

70

196

Finally, add all of the areas together to find the surface area of the whole shape.

140 + 70 + 196 = 406

Person above me is correct

write an equation using x and y to represent the hanger.

Answers

Answer:

Step-by-step explanation:

Givens

The triangle is x

The square is y

Left side

x + 3y is the weight

Right side

4x + y is the weight.

The weights are equal because the hanger is balanced.

Balance equation

x + 3y = 4x + y                 Subtract x from both sides

x-x + 3y = 4x-x + y           Combine

3y = 3x + y                       Subtract y from both sides

3y - y = 3x + y - y             Combine

2y = 3x

Answer

2y = 3x

Answer:

  x +3y = 4x +y

Step-by-step explanation:

A hanger diagram like this is intended to show you that the total weight on the left side is equal to the total weight on the right side.

__

left side

The left side shows 1 triangle and 3 squares. x and y are defined as the weights of the triangle and square, respectively, so the weight on the left side can be represented as ...

  x + 3y

right side

The four triangles and 1 square on the right can have their total weight represented as ...

  4x +y

balance

The intent of the diagram is to show that the left-side weight is equal to the right-side weight. That equality can be written as ...

  x +3y = 4x +y

_____

Additional comment

This problem is not asking for any sort of "solution" or relationship between x and y. We could find such a relationship by solving the equation for y:

  x +2y = 4x . . . . subtract y from both sides

  2y = 3x . . . . . . . subtract x from both sides

  y = (3/2)x . . . . . divide by the coefficient of y

This tells you that the hanger will only be balanced if the weight of a square is half-again as much as the weight of a triangle.

Write at least 4 divisors of 300 that are multiples of tens

Answers

100, 10, 20, 30 those are it I think
10,20,30,100 are all divisors of 300 and are divisible by 10

How to express 5 x 5 x 5 using exponent?

(A) 103 (B) 53 (C) 23

Answers

Answer:

B

Step-by-step explanation:

An exponent is a number multiplied by itself several times. 5x5x5 is multiplying 5 three times, so it would be 5 to the power of 3.

Hey there!

5 * 5 * 5

= 5^3

= 25 * 5

= 25 + 25 + 25 + 25 + 25

= 50 + 50 + 25

= 100 + 25

= 125


Thus, the equation answer should be:

125


Therefore, the overall answer should be: 5^3

(Because you’re EXPRESSING 5 THREE times)


Good luck on your assignment & enjoy your day!


~Amphitrite1040:)

!!25 POINTS!! Probability : Who’s the next president?
The United States of America 2020 Presidential candidates need your help Scenario
calculating what is the probability that they can win the election. (Assume that the above candidates each have an equal chance of winning.) Screenshot the following photo and answer all questions !!Show ALL Work please!! This is part of my final I need as much help as possible before the end of the school year!!

Answers

Answer:

for women is 6/20 or 0.3

Step-by-step explanation:

answer: for women is 6/20 or 0.3

A basket contains 19 apples. There are 9 yellow apples. There are 2 fewer red apples than yellow apples. There are 3 times as many yellow apples as green apples. How many red apples are in the basket? How many green apples are in the basket

Answers

3 green apples and 7 red apples

Answer:

3 green apples

Step-by-step explanation:

3 x 3 = 9    "3 times as many yellow as green apples"

3 green + 7 red + 9 yellow

What translation is shown below?

1. 3 units left
2. 3 units right
3. 5 units left
4. 5 units right

Answers

5 units to the left so the answer is C
5 units to the left which would make the answer C

A rucksack can hold a maximum of 3 kg.
A particular textbook has a mass of 650 g.
What is the maximum number of these textbooks that the rucksack can hold?

Answers

Answer:

4 textbooks

Step-by-step explanation:

3 kg = 3000 g

3000 ÷ 650 = 4.61......

Maximum number is 4 as 0.61... book being carried is not possible

Hope this helped and brainliest please

The maximum number of these textbooks that the rucksack can hold are,

⇒ 4 textbooks

What is Division method?

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications.

For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

A rucksack can hold a maximum of 3 kg.

A particular textbook has a mass of 650 g.

Hence, We get;

⇒ 3 kg = 3000 g

Thus, the maximum number of these textbooks that the rucksack can hold is,

⇒ 3000 ÷ 650

⇒ 4.61

Thus, the maximum number of these textbooks that the rucksack can hold is, 4

Learn more about the divide visit:

https://brainly.com/question/28119824

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Can someone answer this and give an explanation

Answers

Answer: 27

Explanation: Bunny&Cat=10kg it can be 1/9,2/8 etc. it’s 3/7 Bunny 3 Cat 7. With that we know the Dog weighs 17 kg. 17 Dog + 7 Cat= 24. With that it’s easy, 3+7=10+17=27

pleaseeee help thanks.. lol

Answers

Answer: 120

Step-by-step explanation:

[tex]3x4x2x5=120[/tex]

explanation down below↓

The answer I think is: 120

Marco is preparing sales kits for his sales representatives to show to customers. He has 6
samples of tile and 12 samples of carpet, and he wants to create identical sales kits, with no
samples left over. What is the greatest number of sales kits Marco can prepare?
sales kitsp

Answers

Answer:

The answer would be 6 kits, with each kit having 1 tile sample and 2 carpet samples.

He can only make six sales kits, they would each have I tile sample and 2 carpet samples

Please help 5 points each but beware if you use my points for no reason I'll report you

Answers

Answer:

⅓×12×16 = 64 hope it helps

Answer:

the volume of this pyramid is 64

Step-by-step explanation:

1/3×12×16= 64

Marco set aside 50 minutes before dinner to work on his homework. He spent 22 minutes on math. Marco’s grandmother wants to know what percent of his study time he spent on math.

Please help meeeee!

Answers

Answer:

44%

Step-by-step explanation:

(22/50) x 100 = 44% of his study time.

44% because I said so

Which question can be answered by finding a volume? How much wrapping paper is needed to wrap that gift? What is the minimum amount of paint needed to cover a jewelry box? If Brad drank all the juice in a juice box, how much juice did he drink? How many square tiles are needed to cover the picture frame?

Answers

“If Brad drank all the juice in a juice box, how much juice did he drink?” would be the answer because it is the only answer reffering to finding the volume of an object (the juice box) and the volume being the amount of juice.

Answer:

“If Brad drank all the juice in a juice box, how much juice did he drink?” would be the answer because it is the only answer reffering to finding the volume of an object (the juice box) and the volume being the amount of juice.

Step-by-step explanation:

Answer the folllowing sections on transversals

Answers

Answer:

A transversal is a line that intersects a system of lines. The transversal in this case, would be line a.

Step-by-step explanation:

Pls help I have same question super confused

Six students are performing in a talent contest. You roll a numbet cube to determine the order of the performances. You roll the number cube once. Complete the table of theoretical probabilities for the different outcomes.

Answers

Answer:

1/6 for each side.

Step-by-step explanation:

answer to the question is 1/6

BRAINLIEST!!!!!!!!!!!!!!!!!

Amaya is graphing the inequality x>11 on a number line. Which statements below describe steps she may take to graph the inequality correctly? Check all that apply.


Draw an open circle at 11.
Draw a closed circle at 12.
Shade all numbers to the left of 11.
Shade all numbers to the left of 12.
Shade all numbers to the right of 11.
Shade all numbers to the right of 12.

Answers

Answer:

Draw an open circle at 11.

Shade all numbers to the right of 11.

Step-by-step explanation:

If you have an inequality that has a < or a > symbol, then your circle is open.

Because x is greater than 11, you would shade the numbers greater than 11, or to the right of 11.

Answer:

Draw an open circle at 11.

Shade all numbers to the right of 11.

Step-by-step explanation:

she draws an open circle because the "greater than" sign is not "greater than or equal" if it is the sign "greater than or equal" the circle should be a closed circle.

And she shades all numbers to the right of 11 because "x" is greater than 11 and she shades the side that is positive, not negative.

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