Mathematics College

solve each system by substitution
x – y = -4
2x + y = 4

Answers

Answer 1

Answer:

Step-by-step explanation:

x -y = -4

2x + y = 4

3x = 0

x = 0

0 + y = 4

y = 4

(0,4)

Related Questions

Express 13/4 as a mixed number

Answers

Answer:

3 1/4

Step-by-step explanation:

Answer:

3/1/4

Step-by-step explanation:

Please Mark Brainliest!! Hope this helped!!

Mike wanted to purchase a couch for $350.00 and realized the couch was on sale for 25% off. How much would Mike pay for the couch, before taxes, once the discount was applied?
$87.50

$262.50

$349.75

$437.50

Answers

Answer:

87.50

Step-by-step explanation

please please please please please
heeeeeeeeelp


Answer and I will give you brainiliest

​

Answers

9514 1404 393

Answer:

  your marked choice is correct: x = e

Step-by-step explanation:

For the line to go through the origin, the ratio of ln(x) to x at the point must equal the slope at the point.

The slope of ln(x) is 1/x, so we require ...

  ln(x)/x = 1/x

  ln(x) = 1 . . . . . . multiply by x

  x = e . . . . . . . . take antilogs

What is the reciprocal of 4/12?​

Answers

Answer: 12/4 or 3

Step-by-step explanation: Switch the numerator and denominator. This should leave you with the answer above.

Answer:

12/4 = 3/1 = 3

Step-by-step explanation:

To find the reciprocal of a fraction, flip it.

The reciprocal of 4/12 is 12/4 which reduces to 3.

Which equation BEST demonstrates the associative property of multiplication?
(5 + 6) x 7 = 7 x (6 + 5)
(5 x 6) x 7 = 5 x (6 x 7)
5 x 7 = 5 x 7
5 x 7 = 7 x 5

Answers

Answer:

c

Step-by-step explanation:


Which relation is a function?
(8,-4), (8,2), (3, -3), (3, 1), (-1,-1)
(2.0), (4,0), (2, 1), (4, 1), (2, 3)
(2, 1), (4,2), (6,4), (7,5), (8, 6)
(3, 8), (7, 6), (5,5), (4,4), (3, 2)

Answers

3.) (2,1), (4,2), (6,4), (7,5), (8,6)

This is my last question.

Answers

Answer:

NOM and POR

(so so sorry if it's wrong, I tried my best to help you but I had to look up an image of a angle like that but i hope you have a wonderful day, sorry again if i am wrong, i hope i help in a way, in i did not, sorry)

Perfect Purple Water The recipe for Perfect Purple Water says, "Mix 8 ml of blue water with 3 ml of red water." lada mixes 24 ml of blue water with 9 ml of red water. Andre mixes 16 ml of blue water with 9 ml of red water. . Which person will get a color mixture that is the same shade as Perfect Purple Water? Explain or show your reasoning.​

Answers

Analysing the question:

We are given that the ratio between the blue and red color is 8 : 3

as long as the volumes of the colours added simplify to 8 : 3 , the color will be Perfect Purple

Lada's Solution:

Lada mixed 24 mL of blue water with 9 mL of red water

we will try to simplify this ratio:

24:9 = 24 / 9

8 / 3

8 : 3

Hence, the ratio of the colours in Lada's mixture is correct. So, Lada will get perfect purple water

Andre's Solution:

Andre mixed 16mL of Blue water with 9 mL of red water

we will try to simplify this ratio:

16 : 9 = 16 / 9

THIS RATIO CANNOT BE SIMPLIFIED

Hence, the ratio of blue and red color in Andre's mixture is 16 : 9

but the ratio for a perfect purple color is 8 : 3

Since the ratio in Andre's mixture is incorrect, she will NOT get the perfect purple colour

Answer:

Lada will get a color mixture that is the same shade as Perfect Purple Water.

Step-by-step explanation:

Proportions

The mix for Perfect Purple Water contains 8 ml of blue water with 3 ml of red water.

The exact proportion of both ingredients is, blue to red:

[tex]\displaystyle \frac{8}{3}[/tex]

Lada mixes 24 ml of blue water with 9 ml of red water. The proportion is:

[tex]\displaystyle \frac{24}{9}[/tex]

Simplifying by 3:

[tex]\displaystyle \frac{8}{3}[/tex]

The proportion obtained by Lada is the same shade as Perfect Purple Water.

Andre mixes 16 ml of blue water with 9 ml of red water, his proportion is:

[tex]\displaystyle \frac{16}{9}[/tex]

This fraction cannot be reduced and its result is not exactly the same as the perfect required proportion.

Thus, Lada will get a color mixture that is the same shade as Perfect Purple Water.


Х
-7
-3
1
5
9
13
-
- 12
yl -28
4
20
36
52
С C
10
>

Answers

34555555555555555555555555555555555555

7th grade math help me plzzz

Answers

Answer:

a. -7 + 3

b. draw 7 negatives + 7 positives

Step-by-step explanation:

Answer:

3.a) -7 + 3

3.b) 4

I hope this helps!

What isthmus solution to the equation 2x+2=10

Answers

Answer:

addition

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

10-2=8

8/2=4

Hope this helps!

I don’t get this AT ALL I need help tia.

Answers

Answer:

The first graph is the correct answer.

Step-by-step explanation:

I hope this helps.

Answer this please and thank you

Answers

Answer:

The Answer is x^2/2

Step-by-step explanation:

The ^ is the power of _

In this case ^ is the power of 2.

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil. Jason decides to test the land for oil. He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil. What is the probability that the land has oil and the test predicts it?

A.
0.09

B.
0.11

C.
0.36

D.
0.44

Answers

In this case you the probabilities can be multiplied similarly to if you flipped a coin twice. .45 * .80 = .36

Answer:

0.36

Step-by-step explanation:

0.45 x 0.80

= 0.36

YO I NEED SOME HALP WITH THIS

Answers

The correct answer is A

water balloon was thrown from a window. The height of the water balloon over time can be modeled by the function y=-16x^(2)+160x+50. What was the maximum height of the water balloon after it was thrown?

Answers

Answer:

450 Is the maximum height.

Step-by-step explanation:

Use x=-b/(2a) to get your answer.

What is the Calculate

Answers

The answer Mon equals 15

Answer:

From the given figure, we can see that

∠LON = ∠LOM + ∠MON

replacing the variables with the given values

77 = 9x + 44 + 6x + 3

77 = 15x + 47

15x = 30

x = 2

Finding ∠MON:

we are given that ∠MON = 6x +3

now that we know the values of x,

∠MON = 6(2) + 3

∠MON  = 12 + 3

∠MON = 15°

Day 2- Real World- Midpoint

While planning the layout of her yard, Laura created a grid

system representing her backyard. On the grid, Laura placed

the center of a herb garden at the coordinates (3.14) and wants

to place a bird bath at the point (7,29). If Laura wants to

position the center of a flower garden so that the bird bath is

halfway between the herb and flower gardens, at what

coordinates should the center of the flower garden be placed?

(11, 150

O (11,44)

O (4,44)

O (4,15)

Help

Answers

Answer:

Point of the flower garden  R ( 11, 44 )

Step-by-step explanation:

Let´s call   P (  3, 14 ) The center of the herb garden, and Q ( 7 , 29 ) the birdbath point

Differences in coordinates of these two points are:

x axis        7 - 3   = 4

y axis     29 - 14  = 15

Then the point Q ( x , y ) will be at:  Q ( 11, 44)

x axis    x = 11 because    7 + 4 = 11 means that the coordinate 7 is just halfway way between coordinates (x)  3 and 11  ( 4 above 3, and 4 below 11)

Reasoning the same way we conclude y = 44 in this case 29 is just halfway between coordinates  (y) 14 and 44 ( 15 above 14 and 15 below 44)

We can probe getting distance d₁  between P and Q  and d₂ distance between Q and R as:

d₁ = √ (7-3)² + ( 29-14)²

d₁ = √ 16 + 225

d₂ = √ (11 - 7)² +  ( 44 - 29)²

d₂ = √ 16 + 225

Can you help me please

Answers

It would be 94/2 because bisect is half of the angle and 94 divided by 2 is 47

The midpoint of AB is M(3,3). If the coordinates of A are (2, -1), what are the

coordinates of B?

Answers

Answer:

(4, 7)

Step-by-step explanation:

Given that:

Midpoint of AB = M(3, 3)

Coordinate of A = (2, - 1)

Let coordinates of B = (x, y)

Recall :

Midpoint of AB = [(Ax + Bx) / 2, (Ay + By) / 2]

Mx = (Ax + Bx) / 2

My = (Ay + By) / 2

Mx = 3

Mx = (Ax + Bx) / 2

3 = (2 + x) / 2

2*3 = 2 + x

6 = 2 + x

6 - 2 = x

4 = x

My = 3

My = (Ay + By) / 2

3 = (-1 + y) / 2

2*3 = - 1 + y

6 = - 1 + y

6 + 1 = y

7 = y

Hence,

B = (4, 7)

What is the Esquire root of 3?​

Answers

Answer:

1.732

Step-by-step explanation:

.......................

Answer: 1.7321


Explanation: The square root of a number is a value that, when multiplied by itself, gives the number. For 3 , that number is 1.7321 .

I hope you find this helpful.

Swear no one answers but plz show work ?!

Answers

For question 1: formula is
A) 2^x=8, Whats x? Answer: 3
B) x=6^2 then answer: 36
C) 2^x=1/4 Whats x? Answer: -2
D) x^2=9 then you square root it and you’ll get +3 and -3. Since you can’t have (-) answer: 3
E) undefined because a logarithm of a negative number does not exist in set of real number
Hope this helps :)

Which of the following expressions is equal to -3x2 - 12?

Answers

Answer:

C. (-3x+6)(x+2)

Step-by-step explanation:

that should help you

can i get help plzzzzz

and explain how you got the answer

Answers

Answer:

ok

Step-by-step explanation:

during his vacation, dalyn rents a small boat from a rental service that charges a flat fee of $40 plus $10 per hour (including taxes). The total charge comes to $100. Which equation can be used to calculate the number of hours, x, that Dalyn rents the boat?

Answers

Answer:

(100 - 40) ÷ 10 = amount of hours

= 6 Hours

Step-by-step explanation:

HOPE THIS HELPS

PLZ MARK BRAINLIEST

The value of y is directly proportional to value of x.if y =35 when x=140 what is the value of y when x = 70​

Answers

Answer:

try 77

Step-by-step explanation:

What is 27 5/6 - 2/7?

Answers

Your answer would be 27 23/42

Answer:

my calculator says 1159/35

Step-by-step explanation:

x + 5 > 7
it’s inequalities

Answers

Answer:

X>2

Step-by-step explanation:

X+5>7

X>2

×= 7+5=12

×=12

always add the the numbers and the letter is always the answer of what u have gotten.

You accept a job salary of $36,700. After 6 months you receive a 4% raise. What’s your new salary?

Answers

Answer 25:

Step-by-step explanation:

Which statement best describes the relationship between the graphs of the two linear equations below?
3
y=-2 +4
2
3x - 2y = -8
The lines are
parallel
5
The lines intersect
and are
perpendicular
The lines intersect
and are not
perpendicular
The lines are the
same

Answers

Answer:

Step-by-step explanation:

6

Other Questions
Ill give brainiest hurry please What is the correct way to answer this question: Cmo se dice repeat en espaol?1. Me llamo "repita"2. Se dice "repita."3. Soy de "repita"4. Significa "repita". Rewrite in simplest terms: -3(-4g-6g-2)-8g NEED ANSWERS ASAP (Score for Question 2: of 20 points)Read the passage. Then answer the question.Out of PlaceBen bunu yapmayacam . . . I will not do that. He cant have my shoes, he stole my guitar! Erkans eyes looked impudent beneath his dark brow as his cheeks reddened in fury. His gray-whiskered lips trembled as his hand gripped tightly around the nurses wrist. The nurse carefully but firmly freed himself from Erkans grasp. He then turned to the caregiver who was assisting him, smiled, and said calmly, Go get Michelle.Michelle was scanning boxes of gauze bandages and stacking them onto a shelf in the storeroom when the caregiver came in and announced, Phillips trying to get Erkan to take a shower and he needs your help. Michelle rushed out of the store room and down the hall to Erkans room.This was the last week of Michelles internship. It was her junior year, and the internship was part of her Workplace and Consumer Education class. At first she wanted to intern at her dads gas station, but her teacher told her she needed to branch out and signed Michelle up at the Oakcourt Nursing Home, only 15 minutes away from her house.Wearing a Pittsburgh Steelers sweatshirt and jeans, with dark curls pushed back in a hair clip, Michelle stood out from the crowd of nurses and caregivers in white pants and polo shirts who were standing huddled in the doorway of Erkans room. She moved past them and rushed to Erkans side. As soon as he saw her, Erkans face brightened and he stopped looking like a stricken animal and instead looked like someone who recognized a dear old friend.He cant have them, Michelle. I sold them at the corner, Erkan shouted, pushing his way to Michelle. He stole my guitar, he whispered.I know, Erkan, but he was only trying to help you get some money to pay for your trip. Michelle had been frightened by a lot of the residents of the nursing home when she first started the beginning of the semester. Many of them were incoherent and loud, and some could be very aggressive and scary. Erkan often pushed or kicked and ranted. Michelle had started to regret this internship, and she even avoided going near Erkans room whenever possible. He lives in his own world, Philip, the managing nurse, explained to Michelle after her first encounter with Erkans temper.Still, Michelle had been curious, and she felt sorry that Erkan had a bad reputation among the staff. She too had felt like everyone mistrusted herespecially at the nursing home where she was so much younger than the rest of the staffso she understood how he must feel. Besides, he was the only person in the whole place with skin nearly as dark as hers.Over time, she noticed patterns in Erkans rants: He would sometimes mention his guitar and his father and the city of Diyarbakir, which she learned is in Turkey. So she decided that the next time she brought supplies to his room, instead of avoiding Erkan, she would play along with whatever he said. If he lived in his own world, then she would try to join him there. Bit by bit, she discovered that he had immigrated to the United States from Turkey when he was very young. His father had saved as much money as possible to pay for his journey, but he needed to sell Erkans guitar to help cover the cost. Erkan had moved in with his aunts family in Scranton, Pennsylvania, and finished school there. Eventually he got married, had children of his own, and worked for years signing Turkish singers to a small record label. But hed never quite felt at home in the United States.I know he sold your guitar, but you told me yourself he just wants whats best for you, Michelle said, while Philip and the caregiver looked on in amazement as Erkan settled into an armchair. Now why dont you listen to Philip, take your shoes off, and have a shower?For you, Michelle, Ill do it.You can feel out of place in a country, in the place where you live, or even in your own head, Michelle thought. But if youre lucky, someone will know how to find you and remind you that we all feel that way sometimes.In Out of Place, how has Ekrans relationship with Michelle affected him? Discuss interactions between the two characters and explain how Ekran reacts to these interactions. Use evidence from the text to support your response. Your response should be at least two complete paragraphs.Answer:Type your answer here andre has x dollars. He buys lunch using 1/6 of his money and earns 8$ by doing chores after school Jessica completed 20 haircuts in 8 hours. On average how many haircuts per hour did Jessica do? For which of the following processes would S be expected to be most positive? a) O2(g) + 2H2(g) 2H2O(g) b) H2O(l) H2O(s) c) NH3(g) + HCl(g) NH4Cl(g) d) 2NH4NO3(s) 2N2(g) + O2(g) + 4H2O(g) e) N2O4(g) 2NO2(g) 12. Which of the following statements is What are the two largest urban centers in the Crossroads region? Shreveport and MonroeAlexandria and PinevilleNew Orleans and Baton RougeLake Charles and Sulphur PromptWhat is matrix organization? Part C: Create a graph that represents the solutions to the equation from Part A List two environmental factors as to why fires are getting worse each year ? In "The Ride of His Life," what is the author's viewpoint toward Senkos career?Senko is passionate about working with marine wildlife.Senko is overly protective of sea turtles.Senko is on the cutting edge of modern technology.Senko is an avid fisherman who wants to help save wildlife. 11. Which of the following best explains why CO2 gas is easily compressible but solidCO2 (dry ice) is incompressible?The molecules of CO2 gas are much closer together thanthe molecules in dry ice.The molecules of CO2 gas are much smaller than the moleculesof solid CO2OThe molecules of solid CO2 are much closer together thanthe molecules of CO2 gas.The molecules of CO2 gas attract one another, while themolecules of the solid CO2 repel one another.0 What is the acceleration of a 349 kg object that moved with a force of 750 N? What are the 6 types of skill related to physical fitness What is the coefficient of determination for this data set? 8(k - 6) +58 = 2(4k + 5)one solutionno solutionsinfinite solutions What do the pigs do instead of working? what is the answer to 9/11 - 4/11 Which postulate of the kinetic-molecular theory applies to the particles of a liquid?They do not move freely but vibrate in a stationary position.They can be compressed, which causes a large change in volume.They have so much kinetic energy that their intermolecular forces are negligible.They have enough kinetic energy to easily slide by each other.