Mathematics High School

-4x+y=3 and 2x-y=12. which of the options represents the resulting equation after an equivalent expression for yw is substituted into the second equation. Odessyware!

Answers

Answer 1

Answer:

2x - (3 + 4x) = 12

x = -7.5

y = -27

Step-by-step explanation:

-4x + y = 3 (1)

2x - y = 12 (2)

From (1)

y = 3 + 4x

Substitute y = 3 + 4x into (2)

2x - y = 12 (2)

2x - (3 + 4x) = 12

2x - 3 - 4x = 12

2x - 4x = 12 + 3

-2x = 15

x = 15/-2

x = -7.5

Substitute x = -7.5 into (2)

2x - y = 12 (2)

2(-7.5) - y = 12

-15 - y = 12

-y = 12 + 15

- y = 27

y = -27

Related Questions

Fifty 6th grade students chose to play outside for free time. This is 25% of the 6th grade class. How many total students are there in the 6th grade?

Answers

answer- 200

you need to find what number who’s 25th percent equal 50

Alisha buys 6 boxes of peanut butter granola bars and 6 boxes of cinnamon granola bars. Let p represent the number of peanut butter granola bars and c represent the number of cinnamon granola bars. Jaira and Emma each write an expression that represents the total number of granola bars Alisha bought.

Jaira
6p + 6c

Emma
6(p + c)
Are the expressions equivalent?

Answers

Answer:

Yes.

Step-by-step explanation:

Please help.. I don’t understand the problem

Answers

Answer:

answer is 50.

Hope that it is helpful. Vote and like me

You arrive in my class 21 seconds after
leaving math which is 78 meters away. How
fast did you travel?

Answers

Answer:

2.7 secondes a meter

Step-by-step explanation:

I need the answers please.

Answers

Answer:

[tex]y=\frac{-5}{3}x+200\\[/tex]

Step-by-step explanation:

[tex]slope=\frac{rise}{run}[/tex]

[tex]\frac{-5}{3}[/tex]

y-int = 200

[tex]y=\frac{-5}{3}x+200\\[/tex]

good luck, i hope this helps :)

Answer:

y=3/8+.6

Step-by-step explanation:

If 1⁄50 of an amount is 12, what is 1⁄20?

Answers

You start by changing both the a common denominator, this case it would be 100 so it’s 2/100 and 5/100, since 1/50 and 2/100 is the same, each 1/100 is equal to “6” and you have 5/100, which is EQUAL TO 30

Please help!! Giving brainliest and extra points!! (Click on photo)

Answers

Answer:

45

Step-by-step explanation:

12 x 2.5= 30

5 x 6=30

30/2=15

30+15=45

Rosie had 17 yards of fabric. She used one-third of it to make a
quilt. How many yards of fabric did Rosie use for the quilt?

Answers

She used 5.6666 or about 6 yards of fabric for the quilt. Explanation: 17/3 = 5.6666

Answer:

6 Yards

Step-by-step explanation:

Find the area of the triangle in simple root form.
10
30
A=
Please help this is on my final

Answers

21 explanation what 9 plus 10 21 it’s just that simple

The number of fish in a lake decreased by 25% between last year and this year,
Last year there were 80 fish in the lake. What is the population this year?

Answers

Answer:

Step-by-step explanation:

80(1-25/100)

80(75/100)

60

Pls help I need need this soon :)

Answers

B just trust me
Unless you need work

13/4+=3/4 what’s the answer

Answers

Answer:

7 3/4?

Step-by-step explanation:

PLEASE HELPPPPPPP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

m – 12 = 20

Step-by-step explanation:

We see "equals 20", so we can automatically write:

= 20

Whenever something says "than", that means the two things they're saying need to be flipped. For example, 5 less than 1 would be 1 - 5.

So "12 less than a number m" would be m – 12.

Putting it all together would be:

m – 12 = 20

PLEASE ANSWER ASAP !!! WILL GIVE BRAINLIEST

Answers

Answer:

2003, the answer you've selected is correct.

Step-by-step explanation:

You are being asked for the year (x-axis), when there are 550billion passengers (y-axis). The point on the line when y=550 is between 2000 and 2005. 2003 is the only option that fits this description.

Answer: 2003

Step-by-step explanation:

The 550 billion line intersects the time in years after 2000 but just before 2005.

what is the LCM of 3,24, and 2004

Answers

Answer:

4008 is the LCM between the two.

the difference of 10 and a number w is no more than 8

Answers

Answer:10-w< 8

Step-by-step explanation:

How many triangles can be constructed with angles measuring 50°, 90°, and 40°?

one
more than one
none

Will mark correct answer as brainliest.

(Posted 2/11/21)

Answers

infinite triangles can be be constructed using these angle measurements so more than one

Answer:

it would made one triangle

Step-by-step explanation:

it adds up to 180

Help which answer, I think my answer is wrong pls help!!

Will mark BRAINLIST!!!

Answers

Answer:

So I believe you are trying to make them equal so if u moved both to make them seperate cubes I think you are right it would be invalid.

Or if you really think you are wrong it could be not enough information this ia a tricky one. (go with not enough information)

Explain why math is important in your everyday life. Give an example.

Answers

Answer:

People use math knowledge when cooking. For example, it is very common to use a half or double of a recipe. In this case, people use proportions and ratios to make correct calculations for each ingredient. If a recipe calls for 2/3 of a cup of flour, the cook has to calculate how much is half or double of 2/3 of a cup.

Step-by-step explanation:

Answer:

Math is used for financials

Step-by-step explanation:

Your family is planning to take the Amtrak train from Hartford to New York City for a day trip. As a result of some research you learn that your friend Jackie took the train with a group of 3 adults and 5 children and it cost them $269.50. A cousin also took the train to the city with a group of 2 adults and 3 children and it cost them $171.50. Find the price of an adult’s ticket and the price of a child’s ticket.

Answers

Step-by-step explanation:

?? ?????????????????? ??????????

Please help.
Algebra.

Answers

Answer:

Question 5: A       Question 6: B

I need help ASAP I need the answer

Answers

Answer:

sorry I dont know

Step-by-step explanation:

A pizza parlor charges $7.90 for a large pizza plus $1.25 for each additional topping. Write and solve an equation to find the number of extra toppings on a large pizza that costs $11.65.

Answers

Answer:

3 toppings

Step-by-step explanation:

11.65

-7.90

3.75

3.75/1.25=3 toppings

if 80% of students chew gum at least once a day what fraction represents the same percent of students

Answers

Answer:

4/5

Step-by-step explanation:

4/5
hope this helped !

Which relationship is described by the equation y=5x

Answers

Answer:

Direct Variation / Proportinal

Step-by-step explanation:

A general form for a direct variation equation is:

[tex]y=kx[/tex]

'k' is the constant of proportionality.

We can see that the equation given is in that general form, where 5 is the constant or proportionality, or the slope.

Hope this helps.

A football team played 38 games.
19 games were played at home and the rest were played away.
The team won a total of 21 games.
They drew 4 games away.
2 of the 10 games they lost were at home.
Copy and complete the two way table.

Answers

Answer: See explanation

Step-by-step explanation:

               Won     |      Drawn     |      Lost     |      Total

Home |      14                3                     2                19

Away  |       7                  4                    8                19

Total   |     21                    7                   10                38

An iron bar has volume 650 cm' and density 7.87 g/cm3.
Work out the mass of the iron. Give your answer in
a) grams
b) kilograms​

Answers

Answer:

a.5115.5g

b. 5115.5/1000= 5.1kg

Step-by-step explanation:

Given data

volume= 650 cm^3

density= 7.87 g/cm^3

We know that

density= mass/volume

mass= density*volume

mass= 7.87*650

mass= 5115.5 g

a.5115.5g

b. 5115.5/1000= 5.1kg

loooooook below answer number 1234 am giving brainliest

Answers

Answer: for number 1 - answer is 84.7

number 2 - answer is 24

number 3- answer is 47.5

number 4 - answer is 6.5

Step-by-step explanation:

1: 84.7

2: 24

3: 47.5

4: 6.5

Can you help me with these two? Sorry-

Answers

Answer:

Yes

and B are the answer

Have a good day

HELP HELP HELP HELP HELP

Answers

Answer: 32 = 2^y2^5 = 2^ycancel the like terms which is 2 and you will be left with5 = y
Other Questions
What is the difference between light and value?a.Light is the illumination coming from a light source, where as value is the degree of lightness or lack of light in a hue.b.Light is the brightness or dullness of a hue, where as value is the similarity that exists between a certain color and the other colors surrounding it.c.Light is the degree of lightness or lack if light in a hue, where as value is the illumination of an overall piece using monochromatic or analogous colors.d.Light is the element used by artists that directs the eye to given sections of a piece, where as value is the amount of light used in the piece as whole. when forklift moves a crate, it performs _______. Jonah is going to the hardware store for his Uncle Frederick. He needs to buy 4 yards of electrical wireand 14 quarts of liquid nails.a. The store only sells wire by the foot. How many feet does Jonah need?b. The store only sells liquid nails by the gallon. How many gallons does Jonah need? Robert Hooke was the first person to observe that every sample of living things he observed under a microscope were composed of smaller compartments that reminded him of small rooms. Which part of cell theory does this observation support? (Select all that apply.)Grupo de escolhas da perguntaA)Cells are the basic unit of life.B)All cells come from other cells.C)All living things are made of cells.D)This observation does not support any part of Cell Theory.ASAP What is the final amount if 490 is increased by 15% followed by a further 14% increase?Give your answer rounded to 2 DP. Witch expression is equivalent to( 3x+4)-(7x+2) Please help me please I need someone to help me with all this question 1) How do we calculate the momentum of a race car? What part of this changes during a collision? 2) What happening to the momentum of the car when they crash? 3) how does impulse factor into this? 4) what type of collision is it ( ideally) when cars crash into this SAFER barrier? suppose 7,500 is invested at 1.5%, compounded continuously. what will the account balance be in 16 years? which layer of earth is broken into giant plates For every 15 minutes of driving you've drove 600 miles what is the unit rate HELP! I WILL MARK SOMEONE BRAINLIEST!! ASAP In what sense did the flappers dress and dance represent a display of freedom? U.S. presidents are elected through the Electoral College. The Founding Fathers worried that Americans were too spread out to learn enough about the candidates. Under the Electoral College, Americans cast their ballot for the popular vote, which chooses the electors for each state. The number of electoral votes each state equals the number of representatives and senators combined. The candidates must win an absolute majority of electoral votes to win the election.In 1824, Andrew Jackson won the popular vote, but he did not win it in each state. Jackson and Adams both won many electoral votes. Jackson won the most with 99. However, a candidate needs an absolute majority of electoral votes to win. In 1824, Jackson needed 131 to win. When there is not majority winner, the election goes to the House of Representatives. This has only happened twice in U.S. history.Even though he won the popular vote and many electoral votes, Andrew Jackson lost the presidency in 1824. John Quincy Adams was the Secretary of State at this time. Henry Clay was the Speaker of the House of Representatives. Henry Clay, receiving the least, was left out. However, as a leader in the House of Representatives, he had influence over the other members. Clay openly hated Jackson and there were rumors that Clay made a deal with Adams in exchange for his support. The House election declared John Quincy Adams president. Soon, he chose Henry Clay to fill the seat he left vacant, Secretary of State. Jackson was shocked and enraged. Although there was no inquiry of possible wrongdoing, Jackson accused Adams and Clay of making a "corrupt bargain."John Quincy Adams was a disappointment as president. Many of his goals created divisions like federal funds for internal improvement. Some states thought that taking federal funds would force them to follow certain rules. They felt this reduced their rights as independent states. Jackson took advantage of issues like this one to gather more support. More Jackson supporters found their way to seats in Congress. He was as a man of the people and said Adams could never understand the common man's concerns.John Quincy Adams ran against Andrew Jackson in the 1828 election. Personal attacks grew even more vicious, but Andrew Jackson appealed to many. He believed government was for the common man. He believed in strict reading of the law and limited internal improvements. He also believed in states' rights.Andrew Jackson easily won the 1828 election, winning both the popular vote and a majority of electoral votes. Historians note the sectional nature of the voting. Support for Jackson was concentrated in South while Adams' support was mostly in the North. Jackson was so popular because he brought changes to the government. He also wanted to make sure the government was responsible for its actions. Jackson pushed settlement into the frontier. He supported the Indian Removal act. He also defended the spread of slavery. Though his support was heavier in the South, he was determined to keep a unified nation. The rise and presidency of Old Hickory is memorable to Americans today.Which best describes the purpose of the Electoral College in the United States? (5 points) aChooses the winner of an election if the popular vote is disputed bReduces the number of smear campaigns among candidates cPublishes the results from each state's chosen electors dDetermines the winner of the presidential election Which economic system is owned, controlled, and regulated by the government in all aspects of production, trade, and income? Question 10 options: 1. market 2.command 3. traditional 4. mixed Jason worked 3 more hours than Keith.Jason worked 12 hours. Which equationrepresents this situation, if k is thenumber of hours Keith worked?A. 12 + k = 3 B. 12k = 3C. k + 3 = 12D. 3k = 12 Each day your body makes (.......BLANK.....) red blood cells.O 400 thousand300 millionO 600 trillion200 billion In chapter 21 of The First Men in the Moon, Mr. Bedford finally lands on planet Earth. Think about a time you returned home from a long trip or a difficult outing. What emotions did you feel upon seeing the familiar surroundings of home? Write a journal entry describing your experience, and comparing your feelings to those of Mr. Bedfords. What would happen if you discovered the cell wall of a plant was missing? Please answer correctly !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!! if you bought a stock last year for a price of $120 and it has gone down 10% since then how much is the stock worth now Russom deposits $500 into a compound interest account. The interest rate for theaccount is 3.25%. Determine the account balance after 5 years.