Solve the system of linear equations by elimination. 11x−20y=28 , 3x+4y=36

Answers

Answer 1

X= 8 Y= 3 math papa can help you and show you steps

Answer 2

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

The value of x is 8.

The value of y is 3.

What is an equation?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

2x + 4 = 7 is an equation.

We have,

11x - 20y = 28 ____(1)

3x + 4y = 36 _____(2)

Now,

Multiply 5 on (2).

11x - 20y = 28

15x + 20y = 180

26x = 208

This means,

x = 208/26

x = 8

Now,

11x - 20y = 28

11 x 8 - 20y = 28

88 - 20y = 28

88 - 28 = 20y

y = 60/20

y = 3

Thus,

The value of x is 8.

The value of y is 3.

Learn more about equations here:

https://brainly.com/question/17194269

#SPJ2

Related Questions

Please help.17 Points

Answers

Answer:

9738.2

Step-by-step explanation:

cus I'm right 84920021

(-3)^2 = 9
9^2 = 81

or you can do it ((-3)^2)^2 = (-3)^4 = 81

If a = -2, then what is the value of -2a+ 3?

and

If y = 3, what is the value of -3y - 1?

Answers

Step-by-step explanation:

1) 7

2) -4

hope this helps

Only one answer is correct help

Answers

Answer:

9/8 - 2/3 = 11/24

C is the correct answer.

Let me know if this helps!

c is correct ! did this help

The numbers 1–15 are written on note cards and placed in a bag. One card will be drawn from the bag at random. 1. List the sample space for this experiment. 2. Are the events, selecting an even number and selecting an odd number, equally likely? Explain your answer. 3. Are the events, selecting a number divisible by 3 and selecting a number divisible by 5, equally likely? Explain your answer.

Answers

Yes I believe they are 1 to 15. If I'm not wrong please dont report me.

Which rectangle is similar to rectangle ABCD

Answers

Answer:

JKLM is similar to ABCD

Step-by-step explanation:

A: h=12t
B: t = 12h
C: c= h/12
D : h= c/12
PLEASE HELP THANKS IF U DO

Answers

Answer:

D i think is the answer

Step-by-step explanation:

im not sure ok so im just helping

Please help will give brainliest

Answers

Answer:

sorry bro i dont know

Step-by-step explanation:

Answer:

sin A = 3 over 5; 3/5

cos A = 4 over 5; 4/5

tan A = 3 over 4; 3/4

Step-by-step explanation:

what is 2.77 rounded to the nearest ten

Answers

Answer:a

Step-by-step explanation:a

2.8 pls give brainiest

On one day, the grocery store sold 13 bags of raisins, restocked the shelf with 20 bags, sold 19 more bags, restocked 31 bags, and sold 24 bags. There are 11 bags on the shelf now. How many bags of raisins were on the shelf at the start of the day?

Answers

Answer:

Step-by-step explanation:

I guessed and it was right

please solve ILL MARK YOU BRAINIEST!!!!!!!

Answers

Answer:

14. 4 + x - 2

15. 8k - 3k

16. 5 + 2y + 15

Step-by-step explanation:

14. "sum" means adding, "minus" means subtract

sum of four and x: 4 + x

minus two: 4 + x - 2

15. "product" means multiplying, "decreased by" means subtract, "times" means multiply

the product of k and 8: 8k

three times k: 3k

the product of k and 8 decreased by three times k: 8k - 3k

(Depending on what the question is asking, you may or may not need to simplify this to 5k (8k - 3k = 5k))

16. "more" means add, "plus" means add, "twice" means multiply by two

five: 5

plus twice y: 5 + 2y

fifteen more: 5 + 2y + 15

it is 212.5°C outside when the temperature starts increasing by 2.5°C each hour. How long will it take for the temperature to reach 25°C?

Answers

Answer: 75 hours

Step-by-step explanation:

Assuming you meant decreasing... you find out the span between 212.5 and 25 which is 187.5 and then divide it by 2.5 (which is the change)

The figure is a rectangular prism. Identify which one of the line segments in the given figure is perpendicular to . HG

A) BC

B) FG

C) EF

D) BF

Answers

The answer is B.) fG

Answer:

Step-by-step explanation:

i will give brainliest if answered correctly :D 5/1 (the fraction) MINUS 6!

Answers

Answer:

-1

Step-by-step explanation:

5/1 would equal 5.

5-6=-1

hope it helps!

THE ANSWER IS -1 OKAYYYYyyyyyyyyyyy. sorry i had to write more than 20 letters

fill in the table using the function rules

Answers

1. 25
2. 22
3. 19
4.16

1 = 25 2=22 3=19 4=16

I provided a photo of the work. You have to plug-in the numbers into the x. (View photo as reference)

Write this percentage as a fraction in its simplest form.
65%

Answers

Answer:

13/20

Step-by-step explanation:

Answer:

[tex]\frac{13}{20}[/tex]

Step-by-step explanation:

Put the percentage over 100: [tex]\frac{65}{100}[/tex]

Simplify: [tex]\frac{13}{20}[/tex]

In the figure below, find the exact value of z.

Answers

9514 1404 393

Answer:

z = 9/2

Step-by-step explanation:

The triangles in the figure are all similar, so the side lengths are proportional.

long side/hypotenuse = z/6 = 6/8

z = 36/8 = 9/2 . . . . multiply by 6

Find the value of tan
Х
45°
315
Please help me ASAP please

Answers

9514 1404 393

Answer:

Step-by-step explanation:

The right triangle is isosceles, so x = 45° and tan(x) = 1.

You can determine tan(x) either from your knowledge of trig function values, or from the fact that the two legs of the triangle are of equal length. The tangent is the ratio of the opposite leg to the adjacent one. When those legs are the same, the ratio is 1.

Urgent help on math plz

Answers

Answer:

x = 14

Step-by-step explanation:

First, organize your work by showing that lines are similar

Line KV is similar to line RV

Line UV is similar to line LV

etc, etc.

=========================================

Now notice that line KV and line RV have the numbers 9 and 18 accordingly

and notice that it's an x2 difference.

==============================================

Now apply the same thing to line UV and LV and divide 26 by 2

That gets us 13

=======================================

Now plug 13 into the equation (2x - 15)

2x - 15 = 13

==========================================

Now solve for X

2x - 15 = 13

Add 15 to each side

2x − 15 + 15 =13 + 15

2x = 28

Divide both sides by 2

2x / 2 = 28 / 2

x = 14

Find each difference. If you get stuck, consider drawing a number line diagram.

9 − 4

4 − 9

9 − ( - 4 )

- 9 − ( - 4 )

- 9 − 4

4 − ( - 9 )

- 4 − ( - 9 )

- 4 − 9

Answers

1)5
2)-5
3) 13
4)-5
5)-13
6)13
7)5
8)-13

I have to turn it in by tonight

Answers

Answer: (x,y) -> (x,-y)

Step-by-step explanation:

If you take any point, for example (-1,1) from the blue shape, you have to multiply the y value by -1 to get to (-1,-1) for the red shape. You can test it out with any point on the two figures.

Also, by looking at it, you can see that it is a reflection over the x axis and a reflection over the x axis always just multiplies the y value by -1.

Will give brainliest!

The discriminant of a quadratic is 40. How many solutions does the quadratic have?

Answers

Answer:

it means that the roots of the quadratic equation is real and distinct and that means that 40 is a positive value

PLEASE GUYSSSSSSSSSSSSSSSSS

Answers

Answer: (hopefully I didn't make a mistake :D )

y=-3+21

Step-by-step explanation: (I can't sketch the graph for you)

First you need to find the slope of the line passing through the points (5,4) and (-7,0). This can be done using the point-slope form of a line.

Point 1: (-7,0)

Point 2: (5,4)

y2-y1=m(x2-x1)

m= (y2-y1)/(x2-x1) = (4-0)/(5-(-7)) = 4/12= 1/3

Now, when two lines are perpendicular, they are negative recopricols. So the slope of the line would be -3.

Since the equation of the line you are trying to find passes through the point (4,9), using point-slope formula again and solve for y.

y-9=-3(x-4)

y= -3x+12+9

y=-3x+21

Nineteen less than 6 times a number is the same as 16 more than the number. The equation is The solution is x -7 7.

Answers

Answer:

The number is 7

Step-by-step explanation:

let the said number be x

Nineteeen less than 6 times a number;

6x - 19

equals; 16 more than the number; this is 16 + x

Thus;

6x - 19 = 16 + x

6x-x = 16 + 19

5x = 35

x = 35/5

x = 7

how would I solve this

Answers

Answer:

x=12

Step-by-step explanation:

subtract each side by five since it is the inverce oporation

X=12 hope this helps

What is the perimeter of parallelogram ABDC?

14 cm
13 cm
12 cm
11 cm

Answers

Answer:

13 cm

Step-by-step explanation:

Add up all of the sides and you should get 13.

3 + 3 + 3.5 + 3.5 = 13

Find the derivative of f(x) = negative 8 divided by x at x = 11.

Answers

Answer: I think it’s

f ` (x) = - 8 / x²

f ` (11) = - 8 / 121

The value of the derivative at x = 11 is 8/121

The equation of the function is given as:

[tex]f(x) = -\frac 8x[/tex]

Rewrite the above equation as:

[tex]f(x) = -8x^{-1}[/tex]

Using the first principle, the derivative of f(x) is:

[tex]f'(x) = -1 \times -8x^{-1-1}[/tex]

[tex]f'(x) = -1 \times -8x^{-2}[/tex]

Evaluate the product

[tex]f'(x) = 8x^{-2}[/tex]

Rewrite the above equation as:

[tex]f'(x) = \frac{8}{x^2}[/tex]

Substitute 11 for x

[tex]f'(11) = \frac{8}{11^2}[/tex]

[tex]f'(11) = \frac{8}{121}[/tex]

Hence, the value of the derivative at x = 11 is 8/121

Read more about function derivatives at:

https://brainly.com/question/5313449

Please help !!!!! I need to pass

Answers

Answer:

1/10

Step-by-step explanation:

I think

Solve for x. Do not type degree symbol or any spaces
in your answer.
85
40°
X

Answers

145 cause 40+85+90 equals 215 n then subtract that from 360

The value of y varies directly with x. When y = 75, X = 3. What is the value of y when * is is 21

Answers

Answer:

Step-by-step explanation:

21 / 3 = 7

I hope this helps u! :D

1c - 20 = 4 - 3c pls help fast in school rn

Answers

Answer:

4c-20= 4

+20 +20

4c= 24

/4 /4

c= 6

Answer:

c = 1 btw can i be brainiest...

Step-by-step explanation:

First, rewrite the left side of the equation and group and combine like terms:

c + (4 − 3c) − 2 = 0

c + 4 − 3c − 2 = 0

−3c + c + 4 − 2 = 0

−3c + 1c + 4 − 2 = 0

(−3 + 1) c + (4 - 2) = 0

−2c + 2 = 0

Next, subtract

from each side of the equation to isolate the

term while keeping the equation balanced:

−2c + 2 − 2 = 0

−2 − 2c + 0 = −2

−2c = −2

Now, divide each side of the equation by

−2

to solve for

while keeping the equation balanced:

−2c - 2 = −2 − 2

−2c − 2 = 1

c = 1

Other Questions

Please answer with explanation, I don't understand.[tex]\sqrt{x^2-14x+49} =x-7[/tex] What is the length of a diagonal of a rectangular picture whose sides are 12" x 17" round to the nearest 10th of an inch What is the answer to 1014.16667 rounded to the nearest tenths Four fundamental factors affect the cost of money: (1) the return that borrowers expect to earn on their investments, (2) the preference of savers to spend their income in the current period rather than delay their consumption until some future period, (3) the risks associated with the investment, and (4) expected inflation. Consider the following statements that address these factors, and indicate which you think are true.Statement 1: All things being equal, savers and investors expect to receive some amount of maturity premium as compensation for their deferred consumption.Statement 2: Historical inflation rates, as opposed to expected future rates of inflation, should be used when calculating an investments nominal risk-free rate of return.Statement 3: An investment that can provide a 10% return should attract more investment capital than an otherwise identical investment that can only provide a 6% return.Statement 4: The inflation premium used to calculate the nominal interest rate on a five-year security should be equal to the rate of inflation expected in year 5 of the investment.The true statements are:_______.a. 1, 2, 3, and 4b. 2 and 4c. 1, 2, and 3d. 1 and 3 What factors led to San Franciscos growth between 1849 and 1850? Why were the Crusades fought? Who won? I need help fastIf triangle RST cong triangle XYZ , then ST is congruent to which of the following? Can someone help me with this? And provide an explanation on how they found their answer? Using conversion factors. I'm confused :(You have used 3.0102 L of distilled water for a dialysis patient. How many gallons of water is that? A construction worker fills a mold with concrete. This solid figure represents the mold.What is the volume of the concrete that fills the mold? 4. What are the limitations in generalizing findings from model organisms to human biology? On January 1, 2017, Crown Company sold property to Leary Company. There was no established exchange price for the property, and Leary gave Crown a $400,000 zero-interest-bearing note payable, promising 5 equal annual installments of $80,000, with the first payment due December 31, 2017. The prevailing rate of interest for a note of this type is 8%.Required:What is the carrying value of the notes payable at 12/31/14, after the first payment is made (assuming that the effective-interest method is used)? 5.(x + 10)(x + 20) Which mission is not going to explore outside of the solar system?A. SAFIRB. Europa ClipperC. MIRID. Kepler Write the answer in simplest form.1/6 / 1/3 Nitric acid decomposes in light to form nitrogen dioxide, water, and oxygen, according to the following chemical equation. 4HNO3 (l 4NO2(g) + 2H2O (l) + O2(g)If 2.5 g nitric acid decomposes, what is the total volume of gas produced?a. 0.050L b. 0.22 c.0.89 d. 1.1L Introduction to the Articles of Confederation:To all to whom these Presents shall come, we the undersigned Delegates of the States affixed to our Names send greeting.Articles of Confederation and perpetual Union between the states of New Hampshire, Massachusetts-bay Rhode Island and Providence Plantations, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, North Carolina, South Carolina and Georgia.Preamble to the U.S. Constitution:We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.Which option best analyzes the change of focus from state to federal government evident in the Preamble to the U.S. Constitution? The Founding Fathers realized establishing a federal government would help protect America. Swift military action if we are attacked by other nations was important to the Founding Fathers. The Founding Fathers believed separation between the states and territories was important. Viewing American citizens as individuals was important to the Founding Fathers.Please help!! What does Lin threaten to do if the British refuse to end the opium trade? Help ASAP thanks........ What is the mass of an object that requires a force of 4,900 Newton's to accelerate 7 m/s/s a baker took 9 hours to bake 6 cakes how long does it take him to bake 1 cake?