How to solve linear equation

Answers

Answer 1

You can use elimination and substitution method

EXAMPLE :

Given :

2x + y = 5

3x - 5y = 1

2x + y = 5 (× -5)

3x - 5y = 1

__________

-10x - 5y = - 25

3x - 5y = 1

____________ _ (elimination)

-13x = - 26

x = - 26/-13

x = 2

Substitution x = 2 to 2x + y = 5 :

2x + y = 5

2(2) + y = 5

4 + y = 5

y = 5 - 4

y = 1


Related Questions

Fill in the blanks in order to justify whether or not the mapping shown represents a function

Answers

What are the dropdown choices?

The mapping diagram above does not represent a function since there are 2 input values, 7 and 0 that maps to the same output value at 2.

Simplify the expression:
V - 5v - 5v + 9v

Answers

Answer:

0

Step-by-step explanation:

[tex]v - 5v - 5v + 9v \\ - 4v - 5v + 9v \\ - 9v + 9v \\ 0[/tex]

help meeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

I think the answer is 1.392‍♀️

Plzzz help me with this question and I also want working. I will give you brainly.​

Answers

Answer:

In my thinking, The answer is 80, 160

Step-by-step explanation:

x+2x+35+85 = 360

3x+120=360

3x=360-120

3x=240

x=240/3

Therefore, x=80

and,

2x=2*80

=160

cho khối chóp có diện tích đáy B=3 và chiều cao h=4. Thể tích của khối chóp đã cho bằng
A.6
B.12
C.36
D.4

Answers

Answer:

D. 4

Step-by-step explanation:

 [tex]V =\frac{1}{3}Bh=\frac{1}{3}.3.4=4[/tex]

anwererrrrrrrrrrrr plzzzzzzzzzzzz

Answers

Answer:

x=24°

Step-by-step explanation:

(3x-6)°+x°= 90°

4x=90+6

4x= 96°

x= 24°

Answer:

Step-by-step explanation:

(3x-6)°+x°=90°

First, combine like terms:

3x°+x°-6°=90°

4x°-6°=90°

Add 6° to both sides:

4x°=96°

Divide 4 from both sides to isolate x:

x=24°

Check your answer:

3(24)-6+(24)=90°

72-6+24=90°

66+24=90°

90°=90° (correct)

For brainily please help

Answers

i think z is 54 bc all the triangles angles should add up to 180 so you subtract 72 from 180 and since the lengths of the triangle are the same for the two sides the angles should be the same too so divide whatever you got from 180-72 which is 108 and divide it by two which is 54 hope it helped z=54

Marie has 2 spools of ribbon. One spool holds 3 yards of ribbon, and the other spool holds 2 yards of ribbons. She uses all the ribbon to cut bookmarks that are each 1/4 yard long. How many bookmarks does Marie make?

Answers

Answer: 20

Step-by-step explanation:

3+2 = 5 yards

5 divided by 1/4 = 5 x 4 = 20 bookmarks

Item 4 Multiply. [−12 ⋅ 4/7]⋅[−14⋅(−0.1)] What is the product? Enter your answer in the box.

Answers

Answer:

-9.6

Step-by-step explanation:

The product of the given expression [−12 ⋅ 4/7]⋅[−14⋅(−0.1)] is approximately -9.6.

We have,

Let's break down the expression step by step:

[−12 ⋅ 4/7]⋅[−14⋅(−0.1)]

First, let's simplify the expressions inside each set of brackets:

-12 ⋅ 4/7 = -48/7

-14 ⋅ (-0.1) = 1.4

Now, substitute these values back into the original expression:

[-48/7]⋅[1.4]

Now, multiply the two fractions:

(-48/7) * 1.4 = -67.2 / 7

This can be simplified further by dividing both the numerator and the denominator by their greatest common divisor, which is 1:

-67.2 / 7 ≈ -9.6

Thus,

The product of the given expression is approximately -9.6.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ3

Please help me solve this problem ASAP

Answers

Answer:

x=1.6

Step-by-step explanation:

x = 1.6

explanation: causeee lol

I need help with this, please.
Red oak trees grow at a rate of about 2 feet per year. You buy and plant two red oak trees, one that is 6 feet tall and one that is 8 feet tall. The height h (in feet) of the shorter tree can be modeled by h=2t+6 where t is the time (in years) since you planted the tree. The height of the taller tree can be modeled by h=2t+8.

A. Graph both equations in the same coordinate plane.

B. Use the graphs to find the difference of the heights of the trees 5 years after you plant them. What is the difference after 10 years? What do you notice about the difference if the heights of the two trees?

Answers

Answer:

A: I think it's A because you need to graph both equations

Answer:

These are the screenshots of the work I did and more of the actual answer for graphing but basically,

The difference in heights of the trees after 5 years is 2 feet, after 10 years is 2 feet, and after any number of years is 2 feet since the lines are parallel.

Given j∥k and m∠1=40°. What is m∠6 ? Enter your answer in the box.

Answers

Answer:

140

Step-by-step explanation:

hello, please help me

Answers

The answer would beX=-2-2

can someone help me understand this

Answers

Answer:

6 favors each guest

Step-by-step explanation:

3 bag if 12 means total 36

She has divided evenly amongst 6 guest .

36/6 = 6each guest.

Answer:

The answer would be 6.

Step-by-step explanation:

Assuming, Amy doesn't have a sweet tooth, she's only giving party favors to her own guests.

There are 3 bags of 12 party favors each. This gives us a total of 36 party favors.

There are 6 guests and so to evenly split the party favors, we must split 36 into 6 groups, giving us 6 party favors in each group.

COMPUTATION:

3 x 12 = 36

36 / 6 = 6

Hope this helps!

20 is 4/7 of what number?

Answers

Answer:

35

Step-by-step explanation:

Solve each equation
1.0=x^2-7x-18

2. x^2 + 10x = 39

3. 0= x^2-10x+12


4. 2x^2+4x =0

5. 3x^2 -22 +7=0

show work​

Answers

Step-by-step explanation:

1.

[tex]0 = {x}^{2} - 7x - 18 \\ 0 = {x}^{2} + 2x - 9x - 18 \\ 0 = x(x + 2) - 9(x + 2) \\ 0 = (x + 2)(x - 9) \\ \\ \\ (x + 2) = 0 \: \: \: \: or \: \: \: \: (x - 9) = 0 \\ \\if \: \:x + 2 = 0 \\x = 0 - 2 \\ x = (- 2) \\ \\ if \: \:x - 9 = 0 \\ x = 0 + 9 \\ x = 9 \\ [/tex]

The function t(x) = 4x -2 determines how many cans of vegetables a food truck needs to stock on board, where x is the number of shifts the crew is going to work in the truck. The crew uses c(t(x)) to find the amount of money to spend on vegetables. The function c(x) = x + 9. Solve for how much money must be spent when the crew is going to work 2 shifts.

Answers

Answer:

[tex]t(x) = 4x - 2 \\ c(x) = x + 9 \\ c(t(x)) = (4x - 2) + 9 \\ = (4(2) - 2) + 9 \\ = 8 - 2 + 9 \\ = 6 + 9 = 15[/tex]

In a hostel, 45 student consume 660 kg per month, How much rice with a consume by 60 student in 1 month.​

Answers

Answer is 880 kg

pls find the attached image

qs and tv are parallel lines​

Answers

answer:
angle vuw and angle sru


explanation:
corresponding angles

A. Find the indicated number of geometric mean/s between the given two numbers.
1. 5 and 20 [ 1 term ]
2. 8 and 512 [2 terms]
3. 2 and 50 [ 1 term ]
4. 6 and 486 [3 terms]
5. 4 and 108 [2 terms]

Answers

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

The ratio of the given terms is the common ratio raised to a power equal to the number of means plus 1.

1)

For example, the common ratio in the sequence 5, __, 20 will be r, where ...

  r^2 = 20/5 = 4   ⇒   r = 4^(1/2) = 2

Then the mean is found by multiplying 5 by this ratio: 5×2 = 10.

__

2-5)

The same method is used for finding the common ratio and then the intermediate means. Each mean is the previous term multiplied by the common ratio. Results are summarized in the attached table.

_____

Additional comment

When there are a number of similar calculations to be done, it is convenient to let a spreadsheet do them.

Increase the following amount by the percentage given

55 by 137%

Answers

Answer:

130.35

Step-by-step explanation:

https://percentages.calculators.ro/22-number-increased-with-percentage-of-its-value.php?number=55&percentage_increase=137&new_value=130.35

Plz I need help will rate 5 stars

Answers

Answer:

The answer is :

8

.......

simplfy the expression [tex]\sqrt110x^{17} y^{12}[/tex]

Answers

I'm going to assume the square root goes over everything.  

To simplify this, you need to find perfect squares under the radical that are factors of the entire [tex]110x^{17}y^{12}[/tex].

[tex]\sqrt{110x^{17}y^{12}} = \sqrt{x^{16}y^{12}\cdot 110x^{1}}[/tex]

Now that stuff in the front will interact nicely with the square root, but the stuff in the back doesn't, so it just stays under the radical.

[tex]\sqrt{x^{16}y^{12}\cdot 110x^{1}} = \sqrt{x^{16}y^{12}}\cdot \sqrt{110x^{1}} =x^8y^6\cdot \sqrt{110x}[/tex]

And that end piece is the simplified answer.

Answer:

no

Step-by-step explanation:

sorry bru but i dont understand [tex]\sqrt110x^{17} y^{12}[/tex]

Mary has a dance class every 2nd day and painting class every 3rd day. On which of the day will she have both the classes?

Answers

9514 1404 393

Answer:

  every 6th day

Step-by-step explanation:

Mary will have a painting class on the same day as every 3rd dance class. That's the same day as every 2nd painting class. Mary has the two classes together on every 6th day.

  [tex]\texttt{- 1 2 3 4 5 6 1 2 3 4 5 6}\\\texttt{d - d - d - d - d - d - d}\\\texttt{p - - p - - p - - p - - p}[/tex]

Evaluate |-6| + 3|4| + |-5| -0×6.

O 0
O 25
O 23
O 18​

Answers

Well the answer is the 3rd option 23.

confused on what to do for this question?

Answers

orthodox iridium procuring

State if the three numbers can be the measures of the sides of a triangle
8, 9, 14
A) No
B) Yes

Answers

Answer:

No

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

the jenkins family drinks 3/4 of a gallon of orange juice every 3 days. how much orange juice do they drink per day?

Answers

Answer:

1/4 gallon per day

Step-by-step explanation:

Find the 'unit rate:' the measure of juice drunken daily.  To do this, divide '3/4 gallon' by '3 days:"

 3/4 gallon

------------------- = 1/4 gallon per day

    3 days

PLEASE HELP ME!! I DON'T KNOW WHAT TO DO????

Answers

Answer:

Step-by-step explanation:

x-10=4

bring the 10 over  and add it to the 4 and that equals 14 so

x=14  hope this helps have a great day

It’s a -10 so you have to put a 10 in both sides, cancel the -10 | x = 14

A hot-air balloon descended 0.8 meters per second for 10 seconds. It
then climbed at 0.4 meters per second for 5 seconds.
What was the average rate of change in altitude per second?

Answers

Answer:

Step-by-step explanation:

we will use 0,8 in 10 seconds as thats the easiest.

for 10 to become 1 we move the decimel once to the right, 10/10

same will happen to 0.8,

10/10=1

0.8/10=0.08

The hot air-ballon climbs 0,08 meters per second

Other Questions
solve this equation -3x-13=-103 if a= 2, b= -3 and c= 4 evaluate ab-bc s = bc -5, for b whats the answer? How do the coefficients in a balanced equation compare quantities of twosubstances?A. The coefficient of the reactant tells how many product moleculeswill form,B. The ratio of the coefficients equals the ratio of the masses of thesubstances,C. The sum of the coefficients of the reactants equals the sum of theproducts,D. The ratio of the substances' coefficients equals the ratio of theirnumbers of moles, Do you have to carry evidence of insurance whenever you drive. True or False Graph 1.7 on a number line In addition to the negative physical consequences of using alcohol, which choices are social effects of teen alcohol use? Select each correct answer O may eat healthier foods O may lose interest in activitiosung 2 more likely to do poorly in school risk losing friends T8 9 10 It isnt safe to go out today. There was too much S2 yesterday. Many streets are flooded with wate 4.Solve the following equation for x. Representyour answer in two forms, (1) with radicals and(2) with rational exponents: x^4 = y^7 Why is land more vulnerable to wind erosion during droughts?A: Excessive rainfall causes soil to erode.B: Plants that hold the soil die off.C: High temperatures dry out the soil.D: Cold temperatures cause soil to freeze. Solve the systems of equation by graphing In the expression x is a real number, and a andare integers.Use the properties of integer exponents to rewriteBIU.as an exponential expression with a single base and exponent which of the folowing membrane-bound organees conatins sevreal oxidases that are invoved in the oxidation of fatty acids and amino acids during normaletablism and in detoxification of chemicals such as alcohol in the liver Patriots were people who wanted the American colonies to gain their independence from Britain. 8 most important requirements people have in place before they have children A Yugo can accelerate from rest to a speed of 28 m/s in 20 s. What is the average acceleration of the car? What distance does it travel in this time helpp meeeee plsssss a client tells the nurse that she passes urine whenever she sneezes or coughs and its quite embarrassing. how would the nurse describe this type of incontinence? Why are healthy fish habitats important to the ocean economy what effect does the letter have on brutus? brutus decides to warn caesar that his life is in danger. brutus thinks that cassius is committing treason against rome. brutus decides to join the conspiracy to kill caesar. brutus tells lucius to block the door against the conspirators.