2x - y = 8
x + y = 4
How to find the solution using substitution

Answers

Answer 1

Answer:

x =4  &  y=0

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation

Answer 2

Answer:

X=4, Y=4

Step-by-step explanation:

First Solve for y

y= 4-x

Sub that in for y on the other equation.

2x-4-x=8

x=4


Related Questions

what is 14/16 + 1/5​

Answers

Answer:

27/40

Step-by-step explanation:

           1

Simplify   —

           5

Equation at the end of step

1

:

 14    1

 —— -  —

 16    5

STEP

2

:

           7

Simplify   —

           8

Equation at the end of step

2

:

 7    1

 — -  —

 8    5

and then round the denominator up to 40

multiply 5 times 7 now

multiply 8 times 1

35/40-8/40=27/40

Justified” is an option of paragraph formatting in a Word processor. Which of the following contain Justified option?
(1 Point)
Alignment
Orientation
Columns
Borders

Answers

Alignment is the answer to the question

Need help asap!
Given that m

Answers

? What’s the question?

Select the correct answer.
What is the justification for step 2 in the solution process?

12y − 40 − 4y = 6y − 18
Step 1: 8y − 40 = 6y − 18
Step 2: 2y − 40 = -18
A.
the subtraction property of equality
B.
the division property of equality
C.
the addition property of equality
D.
the multiplication property of equality

Answers

Answer:A.

the subtraction property of equality

Step-by-step explanation:

8+10p=12+10p-4
Help me please

Answers

Answer:

p=0

Step-by-step explanation:

subtract 10p from both sides that leaves 8+p=12-4 12-8=4 p=4-4 p=0

Type the correct answer in each box.
What values of a and b make this equation true?
(4 + ✓–49) – 2(/(-4)2 + V–324) = a + bi

Answers

Answer:

-4 , -29

Step-by-step explanation:

The values of a and b that make the equation true are -28 and -9, respectively

How to determine the true values of a and b?

The equation is given as:

(4 + √-49) – 2((-4)² + √–324) = a + bi

Evaluate the exponents

(4 + 7i) – 2(16 + 18i) = a + bi

Expand the bracket

4 + 7i – 32 - 16i = a + bi

Collect like terms

4 – 32 + 7i - 16i = a + bi

Evaluate like terms

-28 -9i = a + bi

By comparison, we have:

a = -28 and b = -9

Hence, the values of a and b that make the equation true are -28 and -9, respectively

Read more about complex numbers at:

https://brainly.com/question/10662770

#SPJ2

DESCRIBE how a power with a zero exponent (a^0) and a power with a negative exponent (a^−n) can be simplified.

Answers

Answer:

[tex]a^{-n}[/tex] is [tex](\frac{1}{a})^{n}[/tex] OR [tex]\frac{1}{a^{n} }[/tex]

[tex]a^{0}[/tex] = 1, where a ≠ 0

Step-by-step explanation:

To simplify the exponents, you must put it in positive value

Example:

The simplest form of [tex]2^{-3}[/tex] is to change the exponent from negative value to positive value.

You can do that by reciprocal the number, [tex]2^{-3}=(\frac{1}{2})^{3}[/tex]You can write it [tex]\frac{1}{2^{3}}[/tex], because 1 to any power equal 1

That means if you want to simplify [tex]a^{-n}[/tex], reciprocal a and change the sign of the power from -n to n

The simplest form of [tex]a^{-n}[/tex] is [tex](\frac{1}{a})^{n}[/tex] OR [tex]\frac{1}{a^{n} }[/tex]

For any number, a (a ≠ 0), 1 × a = a, so, the reason that any number to the zero power is 1 because any number to the zero power is just the product of no numbers at all, which is the multiplicative identity, (1)

Example:

The value of [tex](5)^{0}[/tex] = 1, because it is the product of no numbers, so it is equal to the multiplicative identity (1)

That means [tex]a^{0}[/tex] = 1, where a ≠ 0

Very important note:

[tex](0)^{0}[/tex] is undefined value

7 (2x - 9) = 6x – 15
what is this?

Answers

the answers would be x=6
Answer:

X= 6

Explanation:

7 (2x - 9) = 6x -15

14x-63 = 6x - 15

8x = 48

x = 6

Simplify the following expression using the commutative and associative properties (combining like terms);
-3x + 7 -12 + 5x
Its not showing a actual answer

Answers

Answer:

the answer will be

2x-5

En la casa de Juan, van a pedir pizza para la comida, pero cuando la van a pedir se dan cuenta que deben pedirla por perímetro o área de la misma. La mamá dice que es más grande la de perímetro de 100cm y el papá dice que es más la de área de 100cm². ¿Cuál tiene la razón? *

Answers

Responder:

La pizza con un perímetro de 100 cm es más grande ¿verdad?

Explicación paso a paso:

Deja que la pizza tenga forma circular.

Sea el área de la pizza = πd² / 4 y;

Perímetro de la pizza = πd

d es el diámetro de la pizza

Si la madre dice que el que tiene un perímetro de 100 cm es más grande, para estar seguros necesitamos obtener el diámetro de la pizza. La de mayor diámetro será la pizza más grande.

P = 100cm

100 = πd

d = 100 / π

d = 100 / 3,14

d = 31,85 cm

El diámetro de la pizza mamá es de 31,85 cm.

Si el padre dice que el que tiene un área de 100 cm² es más grande, obtengamos también el diámetro para estar seguros.

A = πd² / 4

100 = πd² / 4

400 = πd²

d² = 400 / π

d² = 400 / 3,14

d² = 127,39

d = √127,39

d = 11,29 cm

Por lo tanto, el diámetro de la pizza padre es de 11,29 cm.

Dado que el diámetro de la pizza madre es mayor que el de esa, la pizza con un perímetro de 100 cm es más grande, lo que demuestra que la madre tiene razón.

(X-7)(3x+2) need answer!!

Answers

Answer: the answer is

=3[tex]x^{2}[/tex]−19x−14  

Step-by-step explanation:  (x−7)(3x+2)

=(x+−7)(3x+2)

=(x)(3x)+(x)(2)+(−7)(3x)+(−7)(2)

=3x2+2x−21x−14

=3x2−19x−14

HELP ME PLEAAASEEEEEEEEE
YEA ITS ME AGAIN I NEED HELP

Answers

Answer:

B. 4/3 hours

Step-by-step explanation:

because in smart

Simplify the radical 3sqrt16a

Answers

Answer:

4a⋅ x/ae

Step-by-step explanation:

Please help me I am so confused it would mean a lot.

Answers

Step-by-step explanation:

1. The midpoint formula says the coordinates of the midpoint are the average of the endpoints.

x = (x₁ + x₂) / 2

y = (y₁ + y₂) / 2

I'll do #2 and #3 as examples.

2. x = (-4 + 10) / 2 = 3

y = (6 + -10) / 2 = -2

So the midpoint is (3, -2).

3. x = (-3 + -6.5) / 2 = -4.75

y = (-8 + -4.5) / 2 = -6.25

So the midpoint is (-4.75, -6.25).

A coordinate plane with 4 lines. The first line is labeled a(x) and passes through (2, negative 4) and (0, 2) and continues past (negative 1, 5). The second line is labeled f(x) and passes through (negative 6, negative 6), (negative 3, 0), and (0, 6). The third line is labeled g(x) and passes through (negative 2, negative 7), (0, negative 3), (1, negative 1) and (2, 1). The fourth line is labeled h(x) and passes through (negative 6, negative 6), (0, negative 3), and (6, 0). When Janelle woke up, it was –3 degrees Fahrenheit outside. As the morning progressed, the temperature rose 2 degrees every hour. Which line on the graph could represent this scenario? a(x) f(x) g(x) h(x)

Answers

Answer:

the answer is g(x)

Step-by-step explanation:

Answer:

G(x)

Step-by-step explanation:

I just did the assignment.

I'll give u full brainlist if u do this!


calculate the agerage speed for each sutuation, rounding your answer to two dicimal places where appropriate:

a) a bus travels 876km in 16 hours

b) an athlete runs 10 km in 26.44 minutes ​

Answers

Answer:

a. 54.75

b. 2.64

Step-by-step explanation:

Find x ÷ y, if x = 3 5/6 and y = 3 3/5 . Express your answer in simplest form.

Answers

Answer:

Step-by-step explanation:

convert 3 5/6 and 3 3/5 into a improper fraction

x=23/6 and y = 18/5

23/6 ÷ 18/5 multiply both sides by 6 to cancel it out

23 ÷ 108/5 multiply both sides by 5 to cancel it out

answer 115/108

Answer:

1 1/45

Step-by-step explanation:

A baseball player swings at the ball 56 times over a season and hits 16 times.
What is the ratio of hits to misses?

Answers

Answer:

2:5.

Step-by-step explanation:

Number of misses = 56 - 16 = 40.

Ratio = 16:40

- which simplifies to   (16/8) : (40 / 8)

= 2:5.

A square has a perimeter of 12x + 52 units. Which expression represents the side length of the square in units
x + 4
x + 4
3x + 13
3x + 43

Answers

Answer:

Step-by-step explanation:

How do I write an equation in point-slope form for m=-3 (-2,-1) ?

Answers

ee a solution process below:
Explanation:
The point-slope formula states:
(
y

y
1
)
=
m
(
x

x
1
)
Where
m
is the slope and
(
x
1
y
1
)
is a point the line passes through.
Substituting the slope and values from the point in the problem gives:
(
y


1
)
=

3
(
x

2
)
(
y
+
1
)
=

3
(
x

2
)

Answer:

y + 1 = -3(x + 2)

Step-by-step explanation:

Point-slope form is y - y1 = m(x - x1)

m= -3  (-2, -1)

Plug -3 in for the m in the equation, -2 in for x1, and -1 in for y1

y - (-1) = -3(x - (-2))

Subtracting negatives will make them positive

y + 1 = -3(x + 2)

This is the point-slope form, continuing to solve for y will give the y-intercept form.

Y-intercept Form:

y = -3x - 7

2/5(j+40)=-4 can you show the work plz

Answers

Answer:

-50

Step-by-step explanation:

2/5(j + 40) = -4

j+40 = -4 ÷2/5

j+40 = -10

j = -10 - 40

j = -50

HURRY FAST I NEED HELP ASAPThe linear function that is represented by which table has the same slope as the graph? On a coordinate plane, a line goes through points (0, negative 3) and (2, 1). A 2-column table with 5 rows. Column 1 is labeled x with entries negative 25, negative 21, negative 17, negative 13, negative 9. Column 2 is labeled y with entries negative 9, negative 7, negative 5, negative 3, negative 1. A 2-column table with 5 rows. Column 1 is labeled x with entries negative 25, negative 21, negative 17, negative 13, negative 9. Column 2 is labeled y with entries 9, 7, 5, 3, 1. A 2-column table with 5 rows. Column 1 is labeled x with entries negative 9, negative 7, negative 5, negative 3, negative 1. Column 2 is labeled y with entries negative 25, negative 21, negative 17, negative 13, negative 9. A 2-column table with 5 rows. Column 1 is labeled x with entries 1, 3, 5, 7, 9. Column 2 is labeled y with entries negative 9, negative 13, negative 17, negative 21, negative 25.

Answers

Omg what type of math is this now I can not help u on that one that is 2 much like no cap it is 2 much do u get tired of that like for me that is 2 much math for me like that look like that is 2 much math like I do not understand that like I was going 2 help u but I can try 2 help u but that is 2 much for me 2 look at but anyways good luck with the math problem

Round each mixed number to the nearest whole number. Then, estimate the sum.
141 +31

Answers

Answer:

172

Step-by-step explanation:

It is already a whole number so you just add.

Re-write in standard form: y=3x-6 * Your answer​

Answers

Answer: 3x-y=6

Step-by-step explanation:

Hope this helps

Convert 0.4 J to kJ.
Please show working

Answers

Answer:

0.0004

Step-by-step explanation:

divide the energy value by 1000

0.4/1000

0.0004. Just like what the other comment said, divide the value of energy by 1000

identify terms, like terms, coefficients, constant terms then simplify the expression

Answers

Answer:

coefficient: a numerical or constant Quanity plays before and multiplying the variable in and algebraic

constant turn: a constant is it's only number or sometimes a letter such as a, b, or c

like terms: our terms food variables and their exponents such as two X over two, (are the same).

Karen is saving money to buy a game . So far he saved $15 , which is three fourths . How much does the game cost ?

Answers

Answer:

$25

Step-by-step explanation:

Let X = total cost of game

         (3/5) X = $15

Multiply both sides of equation by 5/3

  (5/3)(3/5) X = (5/3) $15

                  X = $25

cost of game is $25

convert 3 and 7/8 to decimal

Answers

3.875 is 3 and 7/8 as a decimal

Hope this helped :)

Answer:

Hey!

[tex]3\frac{7}{8}[/tex] in decimal form is 3.875

Step-by-step explanation:

7/8 is 0.875

We just add this to 3 to make 3.875!

I HOPE THIS HELPED!

Solve 3x−5 = 9. (1 point) a x = −3 b x = 2 c x = 7 d x = 8

Answers

Answer:
d) x = 8

Explanation:
3x - 5 = 9
(3x / 3) - 5 = 9/3
x - 5 = 3
x (- 5 + 5) = 3 + 5
x = 8

Answer:

x=7

Step-by-step explanation:

x 3^(x-5)=9 (Original Question)

Check attatched image for explanation

PLZ HELP!!!!! DUE TODAY! 50 POINTS & BRAINLIEST FOR SOMEONE WHO CAN EXPLAIN TO ME WHAT I DID WRONG!!!!!!
p.s. thank you in advance!

Answers

Answer:

all angles are congruent, the smaller is just a dilation, but the angles are all congruent

Step-by-step explanation:

Answer:

see below

Step-by-step explanation:

Yes.

all the internal angles on both similar triangle are congruent.

Other Questions
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Q.1) Read this short passage and answer the question below:Excerpt from The Little MermaidBy Hans Christian Andersen"Come, little sister," said the other princesses; then they entwined their arms and rose up in a long row to the surface of the water, close by the spot where they knew the prince's palace stood. It was built of bright yellow shining stone, with long flights of marble steps, one of which reached quite down to the sea. Splendid gilded cupolas rose over the roof, and between the pillars that surrounded the whole building stood life-like statues of marble. Through the clear crystal of the lofty windows could be seennoble rooms, with costly silk curtains and hangings of tapestry; while the walls were covered with beautiful paintings which were a pleasure to look at. In the center of the largest saloon a fountain threw its sparkling jets high up into the glass cupola of the ceiling, through which the sun shone down upon the water and upon the beautiful plants growing round the basin of the fountain. Now that she knew where he lived, she spent many an evening and many a night on the water near the palace. She would swim much nearer the shore than any of the others ventured to do; indeed once she went quite up the narrow channel under the marble balcony, which threw a broad shadow on the water. Here she would sit and watch the young prince, who thought himself quite alone in the bright moonlight. She saw him many times of an evening sailing in a pleasant boat, with music playing and flags waving. She peeped out from among the green rushes, and if the wind caught her long silvery-white veil, those who saw it believed it to be a swan, spreading out its wings.Based on details in the story, the reader can conclude that the little mermaid A) cares more about humans than her sisters do B) loves the beauty of the princes palace more than her home C) is unhappy with her life below the sea D) is too shy to try and talk to the prince Q.2) Which sentence shows that the little mermaid has been affected by the Prince? A) It was built of bright yellow shining stone, with long flights of marble steps, one of which reached quite down to the sea. B) Here she would sit and watch the young prince, who thought himself quite alone In the bright moonlight. C) Through the clear crystal of the lofty windows could be seennoble rooms, with costly silk curtains and hangings of tapestry; while the walls were covered with beautiful paintings which were a pleasure to look at. 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Marginal benefits will increase for each harvest.B. Opportunity costs will increase for each harvest.C. Marginal costs will decrease for each piece of land.D. Opportunity costs will decrease for each piece of land. help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help