Please answer this today - First correct answer becomes brainliest


Suppose you know x+2y=-1 and 3y-x=-19. What is xy?

Answers

Answer 1
{ x+2y = -1
{ 3y-x = -19

{ x = -1-2y
{ -x = -19-3y

{ x = -1-2y
{ x = 19+3y

-1-2y = 19+3y
y = -4

x = 19+3(-4)
x = 7

(x,y) = (7,-4)

——
check solution
{ 7+2(-4)=-1
{ 3(-4)-7=-19

{ -1 = -1
{ -19 = -19

Related Questions

Raul quiere agregar a su artículo algunos recursos visuales, para que su tema que-
de más comprensible. ¿Cuál opción los muestra?
1. Gráficas
2. Cita textual
3. Ilustraciones
4. Tablas de datos
5. Referencias bibliográficas
B) 1, 4, 5
A) 1, 3, 4
D) 3,4,5
C) 2,3,4
chos Reservados. GOB. EDO. SEECH. MEAD​

Answers

Answer:

La respuesta es la opción A

Divide
f)(4b²+13b + 21) ÷(b+8)​

Answers

Here is ur answer. Hope it help
There is the answer

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

Answers

2x + 2x - 4y - y

= 4x - 5y


( ? ) = -5y

Answer:

-5y

Step-by-step explanation:

combine them -4y +(-1y)

b) Factorise fully
8x + 12x

Answers

Answer:

20x simplified

4x(2+3) factored

each of equal sides of an isosceles triangle is 4cm greater than its height .If the base of triangle is 24 cm ,calculate the perimeter and the area of the triangle​

Answers

Answer:-

192 cm²

Step by step explanation :-

Let us take the height be x , then its side = x + 4. Now half of base will be 12 cm .

According to Pythagoras Theorem :-

=> base² + perpendicular ² = hypontenuse ²

=> 12² + x² = (x+4)²

=> 144 + x² = x² + 16 + 8x

=> 8x = 144-16

=> 8x = 128

=> x = 128/8

=> x = 16 cm .

Hence the height of is 16 cm .So the area will be half the product of base and altitude.

= 1/2 * 16 cm * 24cm .

= 192 cm²

Hence the area of the triangle is 192 cm² .

75
25
Simplify fraction to a mixed number

Answers

Answer:

75/25= 3 wholes

Step-by-step explanation:

Because 25*3=75 so it would be 3 wholes

500g to 0.4kg as a ratio ​

Answers

Answer:

500 : 0.4

Step-by-step explanation:

Arithemetric sequence 4,16,28,40,52

Answers

Answer:

-8 + 12n

Step-by-step explanation:

First term = a = 4

Common difference = d = second term - first term

                                 = 16 - 4

                                 = 12

Nth term = a + (n -1) *d

              = 4 + (n - 1)*12

              = 4 + n*12 - 1*12

               = 4 + 12n - 12

               = 4 - 12 + 12n

                = -8 + 12n

The ratio 2 centimetres to 5 metres can be written in the form
1
:
n
.

Find the value of
n
.

Answers

Answer:

n = 250

Step-by-step explanation:

To express the ratio, the quantities must have the same measures

2 cm : 5 m

= 2 cm : 500 cm [ 1 m = 100 cm ]

Divide both parts by 2

= 1 : 250 → with n = 250

Guided Practice


Determine whether the relation is a function. Explain why or why not.


{(3, 7), (3, 8), (3, –2), (3, 4), (3, 1)}


A.
No; the domain value 3 corresponds to multiple range values.


B.
Yes; there is no value in the domain that corresponds to more than one value of the range.


C.
No; a function must have multiple domain values.

Answers

Answer:

A. it is not a function because there are multiple y-values paired with a single x-value.

Step-by-step explanation:

Write an equation to represent 'twice a number (x) is fifty"​

Answers

Answer:

2x=50

Step-by-step explanation:

Hi there,

Your question is "twice a number (x) is fifty"

Recall how a number is represented by x.

Twice a number would be represented as 2x.

Therefore, to represent that twice a number is equal to 50, that would result in the expression: [tex]2x=50[/tex]

If you're looking to solve this equation, it's often best to think about the "reverse" of the current equation.

Notice how 2 is multiplying the x.

To isolate x, divide that side by 2.

However, recall that whatever is done to one side of an equation must also be done to the other side of the equation. Therefore, you will need to divide both sides by 2.

[tex]2x=50[/tex]

[tex]\frac{2x}{2} = \frac{50}{2}[/tex]

[tex]x=25[/tex]

Equation: [tex]2x=50[/tex]

Solving for x: 25

Hope that helps!

What is the area of the figure?
Enter your answer in the box.
in2

Answers

110^in2 is what I got

Work out the following, giving your answers in their simplest form:
a) 2/3 divided by 1/4
b) 7 divided by 2/3

Answers

definitely recommend the app Fraction Calculator Plus

a) 2 and 2/3
b) 10 and 1/2

a)

Elaina charged $83 on her credit card to buy groceries. If the
balance is now $294, what was the balance before she bought
groceries?

Answers

Answer:

211?

Step-by-step explanation:

I'm not sure if this is correct, but:

294-83=211.

Hope this helps! :)

The balance before she bought the groceries was $277.

What are mathematical operations?In mathematics, an operation is a function which takes zero or more input values (also called "operands" or "arguments") to a well-defined output value.There are five fundamental operations in mathematics: addition, subtraction, multiplication, division, and modular forms

Given is that Elaina charged $83 on her credit card to buy groceries. The balance is now $294.

The balance before she bought the groceries is -

294 + 83

277

Therefore, the balance before she bought the groceries was $277.

To solve more questions on addition, visit the link below -

https://brainly.com/question/29207465

#SPJ2

       

The area of a square is 81 square centimeters. What is the perimeter of the square?

Answers

Answer:

p = 36cm

Step-by-step explanation:

p = 4a

4 × 9 = 36

good luck, i hope this helps :)

Which of the following is an example of polynomial function?​

Answers

Answer:

it's not showings the "following" part

Which measurement is closest to the area of the circle in square centimeters ? A. 31.4cm² B. 78.5cm² C.62.8² D.50.2cm²​

Answers

Answer: it’s a

Step-by-step explanation: took the test got it right

The required measurement closest to the area of the circle in square centimeters is 78.5cm². Option B is correct.

What is an area circle?

The area of the circle is given by the pie times square of the radius.

Area of circle = πr^2

Here,
Let the radius of the given circle be r = 5 cm
Area of the circle = πr²

Substitute the value in the above expression,
Area of the circle = π 5²
Area of the circle = 78.5cm²

Thus, the required measurement closest to the area of the circle in square centimeters is 78.5cm². Option B is correct.

Learn more about circle here:

brainly.com/question/11833983

#SPJ6

A bag contains 42 red, 45 green, 20 yellow, and 32 purple candies. You pick one candy at random. Find the
probability that it is purple or not red.

Answers

Answer:

97/139

Step-by-step explanation:

You add every thing but red so 45+20+32 which equals 97, so 97 is your numerator and to get the denominator you add all the numbers together so 42+45+20+32 which equals 139.

Probability that candy picked is purple or not red is [tex]\frac{32}{151}[/tex].

What is probability?

The probability of an event can be calculated by probability formula by simply dividing the favorable number of outcomes by the total number of possible outcomes. The value of the probability of an event to happen can lie between 0 and 1 because the favorable number of outcomes can never cross the total number of outcomes. Also, the favorable number of outcomes cannot be negative.

According to the question

A bag contains 42 red, 45 green, 20 yellow, and 32 purple candies.

You pick one candy at random.

We have to find probability that it is purple or not red.

Formula for probability:

[tex]P(E) = \frac{Number \ of \ favorable \ outcomes}{Total \ number \ of \ favorable \ outcomes}[/tex]

Total number of favorable outcomes = [tex]42+45+20+32 =151[/tex]

Number of favorable outcomes = 32

Probability that it is purple or not red.

[tex]P(E)=\frac{32}{151}[/tex]

Hence, Probability that candy it is purple or not red is [tex]\frac{32}{151}[/tex].

Find out more information about probability here

https://brainly.com/question/11234923

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please help!!
i’m really stuck and confused!

Answers

Answer:  a.2^3, b. 3^5, c. 4^3 + 5^2, d. 9^4 + 7^2

Step-by-step explanation:

i took this class already

Answer:

a) = 8

b)=243

c)=1 600

d)=321 489

Explanation

a) 2×2= 4×2= 8

b)3×3=9×3=27×3=81×3=243

c)4×4=16×4=64×5=320×5=1 600

d)9×7=63×9=567×9=5 103×7=35 721×9=321 489

Which statement not true

Answers

I'm not sure because There isn't attached

1. There are 16 boys and 18 girls in a Grade 6 math class. Write the ratio of girls to boys in words as simply as possible.
2. The ratio of blue marbles to yellow marbles is 5:1. For every yellow marble, there are ___ blue marbles.

Answers

Answer:

1.)8 boys yo 9 girls

2.)5

Step-by-step explanation:

1)divide by 2

2.) every yellow marble is 1 and there is 5 marbles for each yelllow marble

The ratio of boys to girls in the Grade 6 math class is =

8 : 9.

For every yellow marble, there are five blue marbles.

To find the ratio of a given two quantities how many times one quantity is greater or smaller than the other.

To find the ratio of boys to girls in Grade 6 math class simplify by dividing through with two.

Therefore, 16/18 = 8/ 9, that is 8 boys is to 9 girls.

The 5:1 ratio of blue to yellow marbles means for every yellow marble, there are five blue marbles.

Learn more about ratio here:

https://brainly.com/question/2328454

You roll a number cube. What are the odds of getting a six.

Answers

The odds should be 1/6 because there are 6 sides and the goal is to get one of those 6 numbers

The diameter of a circle is 4 m. Find its area to the nearest tenth.

Answers

Answer:

12.6m²

Step-by-step explanation:

radius=2

Area=π2²=12.6(1dp)

The guy above is right but didn’t round it off. It’s 13 instead of 12.6

1
Write 15% as a fraction in simplest form:

Answers

Answer:

3/20

Step-by-step explanation:

15 / 100

divide both the numerator and denominator by 5: 3 / 20

Answer:

3/20 is it's simplest form.

Step-by-step explanation:

How can we solve this?

we know we can simplify this if we can divide the numerator and denominator by the same number.

15% is equal to 15/100.

15 divided by 5 equals 3.100 divided by 5 equals 20.

Therefore, 15/100 can be simplified to 3/20.

what value of d makes the equation true

Answers

Answer:

16.8

Step-by-step explanation:

the one above would the y

In triangle ABC, A is a right angle and M B=45°. Find BC. If you answer is not an integer, leave it in simplest radical form.

Answers

Step-by-step explanation:

- In a right triangle, if ∠B is 45°, then ∠C is too.

-- Since ∠B  and  ∠C  are equal, the sides opposite them

are equal too.  This is an isosceles right triangle.  Its legs

are equal.

-- (The hypotenuse)²  =  (one leg)²  +  (the other leg)²

                                  =       (12-ft)²  +  (12-ft)²

                                  =              (144 x 2)

     The hypotenuse  =  √(144 x 2)  =  12√2 .

LOL

Please help me find the area of this polygon.

Answers

Answer:

28²

Step-by-step explanation:

area for square

4×4=16

area for triangle

6×2=12

12÷2=6(the formula for finding a triangle area is height×length after that divided by 2)

for both triangle

6×2=12

after that add 12+16 then you have the answer and don't forget your ²...

Mount Mo is 5323 feet tall dawn climbed it in five days she climbed 821 feet on the last day how many feet did she climb in the first four days ​

Answers

Answer:

Step-by-step explanation:

d+821=5323

d=4502

So the distance she climbed in the first four days was 4502 feet.


Can you help me with number 8

Answers

Answer:

A. :)

Step-by-step explanation:

Brainly?

Calculate the gradient of the line using rise/run method.

Answers

Given:

The graph of line.

To find:

The gradient of the line using rise/run method.

Solution:

We know that the gradient of a line is also known as slope.

[tex]Slope=\dfrac{Rise}{Run}[/tex]

Consider the two intercepts, then rise is distance between origin and y-intercept and run is the distance between origin and the x-intercept. But rise must be negative because the value of y decreased from 3 to 0.

[tex]Rise=-3[/tex]

[tex]Run=2[/tex]

Now,

[tex]Slope=\dfrac{Rise}{Run}[/tex]

[tex]Slope=\dfrac{-3}{2}[/tex]

The gradient of the line is [tex]-\dfrac{3}{2}[/tex].

Therefore, the correct option is C.

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