does anyone know how to use substitution for
x+y=21
2x-15=y

Answers

Answer 1

Answer:

Step-by-step explanation:

Replace x

x=-y+21

2(-y+21)-15=y

Then solve the rest


Related Questions

Karen pays $50 to join a health club and $20 each month. So far she has paid the health club $170. Write an equation that could be used to find the number of months, m, that Karen has been a member

Answers

I believe the answer would be Y= 20x +50

The current temperature in Smalltown is 13° F. This is 7 degrees less than twice the temperature that it was six hours ago. What was the temperature in Smalltown six hours ago?​

Answers

Answer:

I Pretty sure it's 3

Step-by-step explanation:

13-7=6

6 divided by 2= 3

A line has a slope of 1/4 and passes through the point (0.2. 4/5).
Find the value of b, the y-intercept.
b=

Answers

Answer:

The value of the y-intercept b is 0.75

Step-by-step explanation:

Here, we want to find the value of the y-intercept

The equation of the line can be written as;

y = mx + b

where m is slope and b is the y-intercept

so y = 1/4x + c

To get the value of b , we substitute for x and y using the given point

4/5 = 1/4(0.2) + c

Multiply

0.8 = (0.25)(0.2) + b

0.8 = 0.05 + b

b = 0.8 - 0.05 = 0.75

Answer:

b=0.75

Step-by-step explanation:

i did it on edge

Rewrite this phrase using algebraic symbols eight times a number is decreased by 12

Answers

Answer:36

Step-by-step explanation:

The ratio of juniors to seniors on the track team is 6:7. How many juniors are on the track team if there are 21 seniors on the team?


answer: 18

Answers

Answer:

There are 18 juniors on the track team

Answer:

There are a total of 18 juniors on the track team.

Step-by-step explanation:

Apply the following ratio to the quantity by multiplying.

6:7 = 6 to 7 or 6/7

6/7 × 21 = 126/7 = 18

Hannah makes $1,500 per month. She spends $450 on groceries and
eating out. What percentage of her budget is spent on food?

Answers

100 dollars I think
Answer: 30%

Explanation

450 divided by 1500 is 0.3

0.3 multiplied by 100 is 30

Answer is 30%

Solve for y: 6x + 2y = 12

PLEASE SHOW STEPS.
(Brainliest is going to be given once 2 people answer.)
# 12 Points

Answers

solve for y first

2y=12-6×

divide each term by 2 and simplify

y=6-3x

Answer:

y=6-3x

Step-by-step explanation:

6x+2y=12

6x+2y=12 divide all by 2

3x+y=6 subtract 3x from both sides

y=6-3x

63.2g of sugar is needed to make 8 cakes how much sugar is needed for 12

Answers

Answer: 94.8

Step-by-step explanation:

To find this, you need half of 63.2 which is 31.6. Then add that to 63.2 and bam, your answer.

Answer:

94.8g of sugar

Step-by-step explanation:

Set up a ratio- [tex]\frac{63.2}{8} =\frac{?}{12}[/tex]

cross multiple- [tex]12*63.2=8*?[/tex]

solve- [tex]758.4 = 8*?[/tex]

divide by 8- [tex]758.4/8 = 94.8[/tex]

EMERGENCY! Please give me the correct answer! ​

Answers

Answer:

The answer is yes!

Step-by-step explanation:

I'm 100% sure, put it into a calculator and it'll give you 1 as the answer.

Answer:

Yes

Step-by-step explanation:

The answer is yes because:

1) As you can see, in standard form the pattern is x * 3 = y

2) If x = 1 it would match the pattern because the next number will be 1 x 3 which is 3, and then the the third number would be 3 x 3 = 9, and then the fourth number would be 9 x 3 = 27 and so on.

Hope this helps! :D

help me please i need the answer now please help

Answers

Given problem:

What is the value of x = ?

 Solution:

Angle on a straight line is 180°

Sum of angles in a triangle  = 180°

Now to solve the problem, we need to find the two internal angles first;

  For the first one;

      let us say it is y;

              163 + y  = 180

                        y  = 180 - 163 = 17°

    For the second, assume it is z;

            69 + z = 180

                    z = 180 -69  = 111°

The sum of the internal angles of the triangle;

    y + z + 2x   =  180

     17 + 111 + 2x  = 180

                    2x  = 180 - 128

                     2x  = 52

                       x = [tex]\frac{52}{2}[/tex]   = 26

The value of x is 26

3 equals what number plus 18?

Answers

Answer:

-21

Step-by-step explanation:

-21+18=3

Given the expression 2m - 7x + 6 + 3x - 4 what are the CONSTANTS?

Answers

4 and 6 are constants

Answer:

The constants are 6 and 4

Step-by-step explanation:

They don’t have variables next to them

Write each equation in y = mx + b form.


1. x - y = 4







2. 2x + y = 9

Answers

Answer:

1. y=x-4

2. y=-2x+9

Step-by-step explanation:

x-y=4

-x   -x

-y=-x+4

÷-1    ÷-1

y=x-4

2x+y=9

-2x   -2x

y=-2x+9

x - y = 4
-y = -x + 4 (1
y = x - 4


2x + y = 9 (2
y = -2x + 9



If you need the steps explained message me or reply to this comment!!!

Julissa is running a 10-kilometer race at a constant pace. After running for 18 minutes, she completes 2 kilometers. After running for 54 minutes, she completes 6 kilometers. Her trainer writes an equation letting t, the time in minutes, represent the independent variable and k, the number of kilometers, represent the dependent variable.

Which equation can be used to represent k, the number of kilometers Julissa runs in t minutes?
k – 2 = k minus 2 equals StartFraction 1 Over 9 left-parenthesis t minus 18 right-parenthesis.(t – 18)
k – 18 = k minus 18 equals StartFraction 1 Over 9 left-parenthesis t minus 2 right-parenthesis.(t – 2)
k – 2 = 9(t – 18)
k – 18 = 9(t – 2)

Answers

Answer:

4th option is coreect

Step-by-step explanation:

Answer:

4th answer is correct.!

Step-by-step explanation:

The amount of Social Security benefits received by an individual that he or she must include in gross income:


a. May not exceed the portion contributed by the employer.

b. May be zero or as much as 85% of the Social Security benefits received, depending upon the taxpayer's Social Security benefits and other income.

c. May not exceed 50% of the Social Security benefits received.

d. Is computed in the same manner as an annuity [exclusion = (cost/expected return) × amount received].

e. None of these choices are correct.

Answers

Answer:

b. May be zero or as much as 85% of the Social Security benefits received, depending upon the taxpayer's Social Security benefits and other income.

Step-by-step explanation:

Social security measures an organization to guarantee individuals against certain risks (social risks). Social security is made up of a set of institutions whose function is to protect individuals from the consequences of various events or situations, generally referred to as social risks.

Social Security is a public service of the State, ensuring all the social risks of workers, employees, liberal professions, self-employed, and non-salaried workers. Social Security provides the benefits provided by the Social Security Code. However, the amount of Social Security benefits received by an individual that they must include in gross income may be zero or as much as 85% of the Social Security benefits received, depending upon the taxpayer's Social Security benefits and other income.

a shop is recording the queuing time of its customers and produces the cumulative frequency graph shown below.
a) how many customers queued for more than 20 minutes?
b) Find the median queuing time .

Answers

Answer:

11 customers

11 minutes

Step-by-step explanation:

Answer:

A) 11 Customers

B) 11 Minutes

Step-by-step explanation:

The front of a box and the sticker label on it are similar
rectangles. The front of the box has a width of 9 inches
and a length of 12 inches. Which dimensions could be
the dimensions of the sticker label?

Answers

Answer: 6 in by 8 in

Step-by-step explanation:

Last year, the school library had a total of x books. Over the summer, the library acquired another 46 books and now had a total of 1,191 books. Which equation could be used to find x, the number of books the library had last year

Answers

Answer:

x is 1,145

Step-by-step explanation:

all you need to do is suntract 1,191 from 46 becase you do not know how many books they started with but you do know how many books they have after and how many books they got over the summer to add

What is the compound inequality?

Answers

Answer:

there are only two options?

Step-by-step explanation:

id say b is the answer

Answer:

B

Step-by-step explanation:

Solution for y = 3x -1

Answers

well this is the form for slope so what you would do is graph this and make sure you have a solid line
X= 1/3 or x=3 or x0.3

sometime outiers can have a significant effect on statistics and sometime they don't . Use the following distribution to determine which statistics are affected by outliers. Round to the nearest hundredth.

Answers

What is the test name?

can someone tell me what's happening here? jk don't just help me answer this plzzzzz

7x+4-2x=6(x+1)-x

Answers

Answer:

the sides are not equal

Step-by-step explanation:

7x + 4 - 2x = 6(x + 1) - x     expand

7x + 4 - 2x = 6x + 6 - x      combine similar terms

7x - 6x - 2x + x = 6 - 4

                  0 = 2    ------ no solution

which statement is true and represent the correct form of scientific notation
A. 5.3 x [tex]10^{-2}[/tex] = -0.053
B. 2 x [tex]10^{4}[/tex] < 20,000
C.-74.308 < -0.74 x [tex]10^{3}[/tex]
D. 12,000,000 = 1.2 x [tex]10^{7}[/tex]

Answers

Step-by-step explanation:

let express them in the same form

5.3*1/100=0.053>-0.053 so A is false

2*10^4=2*10000=20,000 is equal to 20,000 so even B is false

-0.74*10^3=-0.74*1000=-740<-74.308 so even C is false

lets see D

1.2*10^7=12*10^6=12*1000000=12,000,000 which is equal to 12,000,000 so D is true

Solve for y: 6(y –1/3 ) = 4(3y – 5).
The solution is y =?

Answers

Answer:

y=3

Step-by-step explanation:

hi i need the answer to this

Answers

Answer:

She forgot about the negative sign in front of the 3.7, therefore, she added 3.7 to -3.3 which is equals to 0.4

HaEeiiekekekekekek HELP PLEASS

Answers

Answer:

She could arrange the books based on their number. She could start from the smallest number and then move onto the biggest number .  

Step-by-step explanation:

Can someone help me with this pls actually be right I need a good grade

Answers

First divide 16 by 12.

That equals 1.333333333

So divide 20 by that number and find what the hypotenuse is which is 15

After that add up all of the numbers so 9+12+15= 36

Final answer 36 inches or C

THE FIRST PERSON TO GET IT RIGHT GET BRAINLIEST!!!!!!! Plzzz hurry I need to double check my answers.

Answers

its b because like its -2 to the power of 5 which is 0.04=1/25 i think so lol

Answer:

0.04 or 1/25

Step-by-step explanation:

If x = -2, then the equation is f(-2) = 5^-2

5^-2 is 0.04 so,

f(-2) = 0.04 or 1/25

I hope this helps :)

A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. What is the location of the submarine compared to sea level?​

Answers

The starting number is 245.So it’s already pretty deep in the water,then it goes down 83 feet MORE.so that’s 245+83=328 feet. Then the submarine goes UP 103 feet from that point,so 328-103=225 feet,so its closer to the surface than at the beginning(245ft)

Use the graph shown to complete the following sentence.
when x = 1, then y = ___​

Answers

Answer:

-2

Step-by-step explanation:

On the graph when the X value is equal to 1, the Y value is equal to -2.

Other Questions
A 40kg box sits on a shelf 0.5m above the floor. An employee moves the box to a height of 1.8m above the floor. How much work did the employee do in moving the box? A)20J B)72J C)200J D)520J E)720J 17. The area of the large square below is 49 centimetres squared. What are the side lengths of the shaded triangle? Help how do I do it? ABCD explain how the 13th, 14th, and 15th amendment provided African Americans with equality but did not provide African Americans with equity Which wonder of the ancient world did Nebuchadrezzar create? * In the 1800s, Horace Mann believed that American schools should benonreligious and publicly funded.set up by churches for their members.established to educate preachers.private and paid for by the wealthy. A gardener planted flowers of different colors.of the flowers are yellowThe gardener planted 119 purple flowers. How many flowers did thegardener plant?of the remaining flowers are green. The rest of the flowers are purple. HELP FAST IM AWARDING BRAINLYEST 18. in a traditional taxonomic system, a kingdom made up of all prokaryotes except members of the kingdomArchaebacteria What is another word for melody? can someone make sure my essay is good I want to try to get a good grade? _ When the Rosetta Stone was discovered nobody knew how to read the hieroglyphs or ancient Egyptian demotic. The stone was also written in ancient Greek. Since the inscriptions said the same thing in three different languages the Rosetta Sone became a very valuable piece of information. Through the work of many people, it took more than two months to uncover what the Rosetta Stone said. The Rosetta Stone is a rock that was written on by Egyptian priests for the honor of an Egyptian Pharaoh named Ptolemy V Epiphanes. Even though the Rosetta Stone is in three different languages archeologists and scholars were able to translate it and read the inscriptions in a modern understanding. Jean-Francois Champollion was the first to crack the code of the Rosetta Stone. Napoleon Bonaparte's a french soldier was the first to find the Rosetta Stone with the writing near the town of Rashid. While digging the additions of a foundation for a fort near the town or Rashid in the Nile Delta the Stone was found. The Damage on the Rosetta Stone made the three texts incomplete. The Egyptian hieroglyphics had suffered the most damage out of the three texts. Some of the text is incomplete due to cracks and missing pieces from the stone, but scholars and archeologists were still able to translate what it said. The Egyptian priests had craved the Rosetta Stone 196 BC during the Ptolemaic dynasty. The stone was made of a material called Granodiorite. Graph the equation 2xy=9 by plotting points. What is the point slope of a line with the slope 4 that contains the point (-3, -4) ?A. y + 4 = -4 (x + 3)B. y - 4 = -4 (x - 3)C. y - 4 = 4 (x - 3)D. y + 4 = 4 (x + 3) 8.075 x 10-4 in standard form What was significant about the location of Yorktown for Lord Cornwallis? What is an equation of the line that passes through the points (-4, -5) and(-3, -2)? Put your answer in fully reduced form. Pls help answer 1.Which of the following are examples of projectile motiona. a airplane taking offb.a tennis ball lobbed over a netc. a plastic disk sailing across a lawnd.a hawk diving to catch a mouse e. a parachutist drifting to Earthf. a frog jumping from land into the water The length of a rectangle is (5x 1) cm and the width is (11 2x) cm. If the perimeter of the rectangle is 44 centimeters, what is the area of the rectangle? what cells secrete myelin for neurons? a. schwann cellsb. other neuronsc. osteocytesd. leukocytes The Fertile Crescent was fought for as a desirable place in which to live because it had: Which source is least credible?