Help! I need help!
- solve the system using elimination....

Help! I Need Help!- Solve The System Using Elimination....

Answers

Answer 1

x - 3y = -11
-x + 2y = 7

We minus these equations : x - 3y - (-x + 2y) = -18

= x - 3y + x - 2y = -18
2x - 5y = -18

Now, we add these equations :

x - 3y = -11
-x + 2y = 7
-> x - 3y - x + 2y = -4
-y = -4
y = 4

Replace it in 2x - 5y = -18

2x - 20 = -18

2x = -18 + 20 = 2
x = 1

Recheck : 1 - 3 x 4 = -11

-1 + 8 = 7.


Related Questions

A square and an equiangular triangle have the same perimeter. If the area of the square is 144 cm2, what is the length of one side of the triangle

Answers

I believe it would be the length of each side of the square having area 144 cm² is 12cm

prove that if∠ 1 ≅ ∠2, then ∠2 ≅ ∠3. what is m∠1?

Answers

We see that angle 1 and angle 2 are equal.

By the vertical angle theorem, the opposite (vertical) angles of two intersecting lines are congruent, we see that angle 1 and angle 3 must be equal. Since angle 1 and angle 2 are equal, then angle 2 and angle 3 are equal.

And for angle 1, it must be 90 degrees, because if it was any other angle measure, angle 1 and angle 2 could never be equal

What is the product of (3 y Superscript negative 4 Baseline) (2 y Superscript negative 4 Baseline)? StartFraction 6 Over y Superscript 8 Baseline EndFraction StartFraction 1 Over 6 y Superscript 6 Baseline EndFraction StartFraction 6 Over y Superscript 16 Baseline EndFraction StartFraction 1 Over 6 y Superscript 16 Baseline EndFraction.

Answers

The product of these two expressions 3y⁻⁴ and 2y⁻⁴ is 6/y⁸. Then the correct option is A.

What is multiplication?

It is also known as the product. If the object n is given to m times then we just simply multiply them.

The expressions are as 3y⁻⁴ and 2y⁻⁴.

The product of these two will be

[tex]\rm 3y^{-4} * 2y^{-4}\\\\3*2*y^{-4}*y^{-4}\\\\6*y^{-4-4}\\\\6*y^{-8}\\\\\dfrac{6}{y^{8}}[/tex]

The product of these two expressions 3y⁻⁴ and 2y⁻⁴ is 6/y⁸. Then the correct option is A.

More about the multiplication link is given below.

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The result of the product expression [tex](3y ^{-4}) (2y^{-4})[/tex] is 6/y^8

How to determine the product?

The product expression is given as:

(3y ^{-4}) (2y^{-4)

Rewrite the expression properly as:

[tex](3y ^{-4}) (2y^{-4})[/tex]

Rewrite the factors of the expression as fractions

[tex]\frac{3}{y ^4} * \frac{2}{y^4}[/tex]

Multiply 3 and 2

[tex]\frac{6}{y ^4*y^4}[/tex]

Apply the law of indices

[tex]\frac{6}{y ^{4+4}}[/tex]

Add 4 and 4

[tex]\frac{6}{y ^{8}}[/tex]

Hence, the product of [tex](3y ^{-4}) (2y^{-4})[/tex] is [tex]\frac{6}{y ^{8}}[/tex]

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Write an equation to determine the measure of

Answers

The measure of angle ZXY is 23 degrees because the measure of angle MXY is 90 degrees. So using Parts whole postulate, the measure of angle ZXY 90-67=23 degrees.

What is the volume of the figure below if a = 9 units and b = 7 units?

A.
364.5 cubic units
B.
1,296 cubic units
C.
1,012.5 cubic units
D.
760.5 cubic units

Answers

Answer: C

Step-by-step explanation:

This is for my little brother

Answers

B

14 x 2/3
14 x 2 = 28
1 x 3 = 3
28/3 = 9.3333..
9 1/3

Answer:

9 1/3

Step-by-step explanation:

Pls, choose me as brainliest!

Add (4d+1)+(2y+9) please help

Answers

Why would I help if it’s 5 points

Answer: 4d + 2y + 10

Step-by-step explanation: Hoped This Helped! Thx For The Points!

Y-3 = 5(X-2) in standard form​

Answers

Answer:

5x-y=7

Step-by-step explanation:

y-3=5(x-2)

y-3=5x-10

y=5x-10+3

y=5x-7

5x-y=7

Jane is 7 years older than John.If the sum of their ages is 43.How old is Jane and how old is John​

Answers

Answer:

If

Jane= x

John = y

y+7= x

x-y=7 ---- (1)

x+y=43 --- (2)

(1) + (2),

x-y+x+y=7+43

2x=50

x= 50÷2

x= 25

substituting x= 25 in (2),

25+y=43

y= 43-25

y= 18

Jane is 25 years old and John is 18 years old.

Step-by-step explanation:

Factor completely 3x2 − 11x 8. (x 4)(3x − 2) (x − 2)(3x − 4) (x 1)(3x − 8) (x − 1)(3x − 8).

Answers

The factors of the equation [tex]3x^{2} -11x+8[/tex] will be [tex](3x-8)(x-1)[/tex]

What will be the factors of the given equation?

When we split the equation into two groups we will get

[tex]3x^{2} -3x-8x+8[/tex]

[tex]3x(x-1)-8(x-1)[/tex]

Now taking (x-1) common

[tex](3x-8)(x-1)[/tex]

Thus the factors of the equation [tex]3x^{2} -11x+8[/tex] will be [tex](3x-8)(x-1)[/tex]

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What is the solution
X^2-4x=-1 ?

Answers

Answer:

Factor x2−4x

x2−4x

=x(x−4)

Answer:

x(x−4)

Step-by-step explanation:

Answer:

x (x-4)

Step-by-step explanation:

Two triangles that have three pairs of proportional sides are always similar. Identify the ratios of the length of
each side. Tell whether the triangles are similar or not similar and explain why.
Triangle 1: 18, 24, 36
Triangle 2: 16, 18, 24

Answers

Answer:

Step-by-step explanation:

Given "Two triangles that have three pairs of proportional sides are always similar."

Triangle 1: 18, 24, 36

Triangle 2: 16, 18, 24

16/18 = 8/9

18/24 = 3/4

24/36 = 2/3

So the three pairs of sides are not proportional and the triangles are not similar.

18/18=124/24=136/16=2.2

No as

One ratio is unsimilar so triangles are not similar

Una compañía de transporte público cobra " "x" " por transportar cierta mercancía 20 kilómetros y " "z" " por transportar la misma mercancía 25 kilómetros. A) Determine la relación entre la tarifa total y la distancia recorrida, suponiendo que es lineal. B) ¿Cuál es la tarifa mínima por transportar esta mercancía? C) ¿Cuál es la cuota por cada kilómetro que la mercancía es transportada?" x = $190. 00 z = $242. 0. Prueba con las sugerencias que aparecen más abajo o introduce una consulta nueva

Answers

Utilizando los dos puntos dados, veremos que la relacion lineal es:

A) y = ($10.4 /km)*x -$18A) y = ($10.4 /km)*x -$18B) -$7.6C) $10.4 /km¿Como encontrar la relacion lineal?

Una ecuación lineal se escribe como:

y = a*x + b

donde a es la pendiente y b es la ordenada al origen.

Sí sabemos que una linea pasa por los puntos (x₁, y₁) y (x₂, y₂), entonces la pendiente va a ser:

a = (y₂ - y₁)/(x₂ - x₁).

Aca tenemos los dos puntos:

(20km, $190)

(25 km, $242)

Entonces la pendiente será:

a = ($242 - $190)/(25km - 20km) = $10.4 /km

y = ($10.4 /km)*x + b

Para obtener el valor de b, usamos uno de los puntos. Evaluando en x = 20km deberiamos obtener y = $190, entonces:

$190  =  ($10.4 /km)*20km + b

$190 = $208 + b

$190 - $208 = b = -$18

Entonces la ecuación es:

y = ($10.4 /km)*x -$18

B) La tarifa minima es lo que obtenemos con x = 1 km, entonces es:

y =  ($10.4 /km)*1 km - $18 = -$7.6

Notar que da un valor negativo, lo que indica que la relación quizas no es lineal.

C) La cuota por kilometro es la pendiente de la relación lineal, en este caso será: $10.4 /km.

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PLSSS HELP IF YOU TURLY KNOW THISS

Answers

Answer/Explanation:

The answer is B!

A mixed number from an improper fraction is when you take that improper fraction and fix it into whole numbers. It's kind of like a decimal but with fractions.

Examples:

6/4 = 1 and 2/4 or 1 and 1/2

9/2= 4 and 1/2

17/6= 2 and 5/6

Make sense?

improper fraction into a mixed number
1. divide the numerator by the denominator

2. the quotient becomes the whole number

3. the remainder becomes the numerator

4. the denominator remains the same.

12 : 5 = 2 remainder 2

[tex]\tt \dfrac{12}{5}=2\dfrac{2}{5}[/tex]

PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS PLS ASAP

Answers

Answer:

(-6, -7)

explanation:

The value of y will be negative and x value shall be same.

Here the original coordinates of A: (-6, 7)

so when reflected: (-6, (-)7) = (-6, -7)

The original price of a dress is $39.99. Julie buys the dress when it is on sale for 10% off its original price. Two weeks later, Mindy buys the same dress when it is now on sale for 20% off its original price.

How much more money did Julie spend than Mindy on the dress?

$ [blank] −−−−−−
Enter your answer as a number. If it is a decimal, round it to the nearest whole number, like this: 42

Answers

Answer: julie spent 4 more dollars than mindy

Step-by-step explanation: julie spent 36 dollars in the dress while mindy spent 32 dollars

Julie spend  [tex]\$4[/tex]  more money than Mindy on the dress.

What is off/Discount?

Off/Discount is an amount that is subtracted from the regular price of an item.

The original price of dress [tex]= \$39.99[/tex]

Julie buys the dress for [tex]10\%[/tex] off at its original price.

So,

Julie buys the dress for  [tex]= 39.99-(39.99*\frac{10}{100} )[/tex]

                                         [tex]= \$35.991[/tex]

Mindy buys the same dress for [tex]20\%[/tex] off at its original price.

Mindy buys the same dress for [tex]= 39.99-(39.99*\frac{20}{100} )[/tex]

                                                    [tex]=\$31.992[/tex]

So,

Julie spend more money than Mindy on the dress [tex]=35.991-31.992[/tex]

                                                                                    [tex]=\$3.999[/tex]

                                                                                    [tex]=\$4[/tex]

Hence, we can say that Julie spend  [tex]\$4[/tex]  more money than Mindy on the dress.

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can someone please help me ;w; i would appreciate it

Answers

Answer:

Leg: BC (or CB)

Leg: AC (or CA)

Hypotenuse: AB (or BA)

Answer:

Leg 1: BC (CB) 3cm

Leg 2: AC (CA) 4cm

Hypotenuse: AB (BA) 5cm

Step-by-step explanation:

5.8×10^7 bacteria are measured to be in a dirt sample that weighs 1 gram. Use scientific notation to express the number of bacteria that would be in a sample weighing 18 grams.

Answers

if Ibacteria are measured to be in a dirt sample that weighs 1 gram, Then he sample of bacteria that would be in a sample weighing 18 grams t is mathematically given as

x=1.044×10^9

What is the sample of bacteria that would be in a sample weighing 18 grams?

Question Parameter(s):

5.8×10^7 bacteria are measured to be in a dirt sample that weighs 1 gram.

Generally, the equation for the statement  is mathematically given as

5.8×10^7=1g

x=18grams

Therefore

x=\frac{5.8×10^7*18}{1}

x=1.044×10^9

In conclusion,  the sample of bacteria is

x=1.044×10^9

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Use the equation to answer the following question. 3x^(2)+7x-20=0
What are the solutions of the equation?
A. x=-(5)/(3) and x=4
B. x=-(4)/(3) and x=5
C. x=(4)/(3) and x=-5
D. x=(5)/(3) and x=-4
I just need help please

Answers

Answer:

D. x=(5)/(3) and x=-4

Step-by-step explanation:

mulitply 3 and -20 =

-60

which 2 factors of -60, that when added make +7?

+12 and -5 do this

3(x+12/3)(x-5/3) = 0

3(x+4)(x-5/3)=0

divide both sides by 3

(x+4)(x-5/3)=0

x= -4 and x=5/3

If you are given the graph of g (x) = log Subscript 2 Baseline x, how could you graph f (x) = log Subscript 2 Baseline x 5? Translate each point of the graph of g(x) 5 units up. Translate each point of the graph of g(x) 5 units down. Translate each point of the graph of g(x) 5 units left. Translate each point of the graph of g(x) 5 units right.

Answers

The function that translates every point of the function f(x) 5 units above can be represented by g(x)=log₂x + 5.

What is a Function?

A function assigns the value of each element of one set to the other specific element of another set.

As the function that is given to us is f(x)=log₂x, therefore, the function can be written as,

[tex]y=f(x)=\rm log_2x[/tex]

Now, since we need every point to be up by 5 units, therefore, every value of x should be +5 on the y axis, therefore, the function that will represent that every point up by 5 units of the function f(x) can be written as,

[tex]g(x) = y+ 5\\\\g(x) = f(x) + 5\\\\g(x) = {\rm log}_2x + 5[/tex]

Hence, the function that translates every point of the function f(x) 5 units above can be represented by g(x)=log₂x + 5.

Learn more about Function:

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Answer:

Its A:  Translate each point of the graph of g(x) 5 units up.

Step-by-step explanation:

Start at (5, 4). Move 5 units east, 4 units south, 4 units west, 4 units north, and 1 unit west.
What is the ordered pair of the final point?

Answers

Using translation concepts, it is found that the ordered pair of the final point is given by:

D. (5,4).

What is a translation?

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

In this situation, considering that we start at point (5,4), the translations are as follows:

5 units east, hence x = x + 5 = 10.4 units south, hence y = y - 4 = 0.4 units west, hence, x = x - 4 = 6.4 units north, hence y = y + 4 = 4.1 unit west, hence x = x - 5 = 5.

It ends at the starting point, hence option D is correct.

More can be learned about translation concepts at https://brainly.com/question/4521517

Terry has an investment account which compounds interest continuously at an annual interest rate of 1. 4%. After 3 years, he has $1700 in the account. How much money did he initially place in the account? Round your answer to the nearest dollar. Do NOT round until you've calculated the final answer

Answers

Answer:

  $1,630.08

Step-by-step explanation:

The value of an amount earning interest continuously compounded is given by the formula ...

  A = Pe^(rt)

The value of P can be found by dividing by its coefficient:

  P = A/(e^(rt)) = Ae^(-rt)

  P = $1700·e^(-0.014·3) ≈ 1630.0786

Terry placed $1,630.08 in the account.

when does it become more efficient to buy another ticket book instead of additional individual tickets

Answers

Answer:

Because it’s easier to be alone than without friends if ur a depressed emo like me

2. Calculate the area of
the three figures.
Which figure has the
greatest area?

Answers

Answer:

can you send a clearer picture

10 less than the product of 4 and z

Answers

Answer:

4z-10

Step-by-step explanation:

Hope this helped idek if its an option but so srry if its wrong.

4z-10

hope this helped! :)

Is the number 56,240
evenly divisible by the
number 10?
Yes or no

Answers

yes the number 56,240 is evenly divisible by 10

Start a 4 create a pattern that multiplies each number by 2 and subtracts 1. Stop when you have 5 number

Answers

Answer:

(0 x 2) - 1 = -1

(1 x 2) - 1 = 1

(2 x 2) - 1 = 3

(3 x 2) - 1 = 5

Amy went on a vacation for 6 weeks last summer. how many days. long was
Amy's vacation

Answers

Answer:

42 days

Step-by-step explanation:

6 weeks times 7 days is 42 days i believe

Consider the polynomial 3x3 - 2x + 7.

1) How many terms does this polynomial have?

2) What is the coefficient of the second term?

1) The polynomial has five terms.

2) The coefficient of the second term is - 2.

1) The polynomial has five terms.

2) The coefficient of the second term is x.

1) The polynomial has three terms.

2) The coefficient of the second term is - 2.

1) The polynomial has three terms.

2) The coefficient of the second term is x.

Answers

Answer:

1.  Three terms 2. the coefficient is x

Step-by-step explanation:

1) The polynomial has three terms.

2) The coefficient of the second term is -2.

What is polynomial?

"It is composed of variables, constants, exponents, and combined using the mathematical operations such as addition, subtraction, multiplication."

For given question,

We have been given a polynomial [tex]3x^3 - 2x + 7[/tex]

For given polynomial, the total number of terms = 3

The second term of given polynomial is -2x.

So, the coefficient of the second term is -2.

Therefore,  1) The polynomial has three terms.

2) The coefficient of the second term is -2.

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Evaluate the expression when a=- 7 and x=3.
a-8x

Answers

Answer:

-31

Step-by-step explanation:

a - 8x will change to (-7) - 8(3) = -31

Answer:-31

\(31\)

Step-by-step explanation:

Substitute: \(7 - 8 \times (- 3)\)

Remove the parentheses:\(7 + 8 \times 3\)

Calculate the product or quotient:\(7 + 24\)

Calculate the sum or difference:\(31\)

Answer: \(31\)

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