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

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

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

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.

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°

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 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)

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

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.


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

Answers

34555555555555555555555555555555555555

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

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

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!

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)

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.

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)

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:

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 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

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.

can i get help plzzzzz

and explain how you got the answer

Answers

Answer:

ok

Step-by-step explanation:

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:

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:

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

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.

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.

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!

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!!

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