Mathematics High School

Solve the system of linear equations by substitution.
1/2x +y=-4
y = 2x + 16

Answers

Answer 1
sub 2x+16 for y into the 1st line so
1/2x+2x+16=-4 now find x
which is x=8 not plug in -8 for x, does not matter which one
you will get y=0
answer•
x=-8
y=0
(-8,0)
Answer 2

Answer:

y = 0

x = -8

Step-by-step explanation:

1/2x + y = - 4

y = 2x + 16

1/2x + (2x + 16) = - 4

1/2x + 2x = - 4 - 16

5/2x = -20

2/5 x 5/2x = -20 x 2/5

x = -40/5

x = -8

y = 2x + 16

y = 2(-8) + 16

y = -16 + 16

y = 0

Check:

1/2x + y = - 4

y = 2x + 16

1/2(-8) + (0) = -4

-4 + 0 = -4

-4 = -4

y = 2x + 16

(0) = 2(-8) + 16

0 = -16 + 16

0 = 0

Related Questions

How do I solve this equation by completing the square. 4X^2 + 12x +5 = 21

Answers

The Answer is: x1=-4 x2=1.

v=u + at
u= 2
a= -5
t = 1/2
Work out the value of v.

Answers

Answer:

V= -1/2

Step-by-step explanation:

You would have to add U+AT to get V

If A=-5 and T=1/2, then -5*1/2= -2.5 (A*T)

Then, adding U (which is 2), gives -.5, or -1/2

A seed company planted a floral mosaic of a national flag. The perimeter of the flag is 420 feet. Determine the​ flag's length and width if the length is 110 feet greater than the width. Use pencil and paper. Write three situations to which you could apply the resulting system of equations.
What is the length of the flag?

Answers

Answer:38

Step-by-step explanation:

What is the ratio 28 : 35 written in lowest terms?
A.9: 15
B.7:19
C.4:5
D.3:7​

Answers

Answer:

4:5

Step-by-step explanation:

both sides divide by 7

can you please help me with this​

Answers

Answer:

Dot plot

Step-by-step explanation:

Each dot on on 0.84 represents each plane. 5 planes had a average cruising speed of 0.84.

can someone help me understand this ​

Answers

Answer:

The answer for the question is E.

The obriens are buying new windows for their house. The company installs the new windows for 2100 the total cost for buying the windows and having them installed is 5323.50 of the o'briens pay 230.25 per window how many windows did they buy

Answers

Answer:

14

Step-by-step explanation:

Given that:

Cost of purchase and installation = 5323.50

Cost per window = 230.25

Cost of installation = 2100

Hence,

Total purchase cost of windows alone :

5323.50 - 2100 = 3,223.50

Therefore, the number of windows purchased is :

(Total purchase cost of windows alone / price per window)

(3,223.50 / 230.25)

= 14

Hence, 14 windows was purchased


If a 70 kg person on a 15 kg sled is pushed with a force of 300 N, what will be person's
acceleration?

Answers


4 m/s

Explanation:
From Newton’s second Law
F = ma

a
=
F
m
=
300 N
60 kg + 15 kg
=
300 N
75 kg
=
4 m/s
2

SOMEONE ANWSER QUICK !

If you want to solve the system of equations below using the elimination methiod, which of the following should NOT be
your first step:

-3x + 4y = 0
2 - 2y = 8

A)Multiply every term in the bottom equation by 3.

B) Multiply every term of the bottom equation by 2.

C) Multiply every term of the bottom equation by -3.

D Multiply every term of the top equation by 2, and every term of the bottom equation by 4.

Answers

Answer:

I think that the answer would be C because you have to multiply the term at the top. This would mean you would not do C. Sorry if this is wrong. At least you have your eliminating process now. lol so doing C is out of the box, which makes C your answer.

Step-by-step explanation:

Even if you don’t think it is an independent variable, _____ is usually always plotted on the “x” axis.


Help?

Answers

Answer:

Y axis is dependent

Step-by-step explanation:

and x axis is independent, so if its on the x axis, its alwasy a independent variable, hope it helped Lol

Which value of x makes the equation x + 7 = 21 true?
O A. 7
O B. 14
O c. 21
OD. 28

Answers

Answer:

b. 14

Step-by-step explanation:

PLEASE ANSWER! 15 POINTS

Answers

Answer: 13/15

Step-by-step explanation:

1/5 + 2/3 = 13/15. Since 13/15 can’t be simplified, that’s your answer.

quick!! write an equation in slope intercept form using points (-3,0) (3,-4) !

Answers

Answer:

i dunno but the slope is -4/6

Step-by-step explanation:

y=-2/3x -2 this is the slips intercept form
You do y1-y2/x2-x1 and then find the rest using y=mx+b

please help me i don’t understand how to do this

Answers

what do u need help with?

Which table does NOT show y as a function of x?

Answers

Answer:

C

Step-by-step explanation:

I don’t really know what to say haha, it’s easy

In a football stadium, 43% of the crowd cheering for Team A, and 52% of the crowd is female. 19% of the crowd is cheering for Team A and female . What is the probability that a randomly selected Person from the crowd are cheering for Team A or female?

Answers

P(TeamA) = 0,43
P(Female) = 0,52
P(TeamA and Female) = 0,19
P(TeamA or Female) = ?

P(TeamA or Female) = P(TeamA) + P(Female) - P(TeamA and Female) <=>

P(TeamA or Female) = 0,43 + 0,52 - 0,19 <=>

P(TeamA or Female) = 0,76 or 76%

I need help one this question.

Answers

Answer:

-2

Step-by-step explanation:

the y-intercept is -2

Answer:

y=2x-2

Step-by-step explanation:

Find the slope.

y1-y2/x1-x2

2-(-2)/2-0

That gives you 4/2 or a slope of 2.

The y intercept is at -2.

Y=2x-2

15PTS PLEASE HELP ASAP!
(dont write random answers pls))

Answers

Answer:

i think the answer is (-8,-12) but i may be wrong plese correct me if  i am

Step-by-step explanation:

If x to the first power is a line, and you multiply two lines together, what do you get? Think of the the exponent.

Answers

Answer: A quadratic equation (also called a parabola)

Step-by-step explanation:

A line can be written as:

f(x) = a*x + c

This is a polynomial with degree 1.

Now, of we have two lines:

f(x) = a*x + c

and:

g(x) = d*x + e

And we multiply them, we will get:

f(x)*g(x) = (a*x + c)*(d*x + e) = a*d*x^2 + a*e*x + c*d*x + c*e

We can rewrite this as:

                                           = (a*d)*x^2 + (a*e + c*d)*x + (c*e)

This is a polynomial of degree = 2, this is a quadratic equation, then if you multiply two lines together, you get a quadratic equation (or a parabola)

Answer:

ax^2+ bx + c

Step-by-step explanation:

I get a parabola, that is, an equation of the second degree

someone please solve and find the corresponding angles thanks

Answers

the correct option is b

The value of the digit in the hundreds place in the number 587,349 is 1/10 the value of the digit in the thousands place in which number? *

Answers

Answer:

3000 is your answer

Step-by-step explanation:

The 3 in the hundreds place if the number 587,349 has a value of 300. This 300 is 1/10 the value of the number you're looking for, so if x is the number you're looking for, then

[tex]300 = \frac{1}{10} x[/tex]

[tex]300 \times 10 = \frac{1}{10} x \times 10[/tex]

[tex]3000 = x[/tex]

x is your answer.

Pls help fast will give brainliest

Answers

Answer:

23

Step-by-step explanation:

6×3+5(3-2)

6×3+5×1

18+5

23

Find two numbers with sum 82 and difference 30.

Answers

Answer: I think it would be 112.

Step-by-step explanation:

transversals angles​

Answers

B. 2 because it is inside and on the same side as 1

What is 149/15 as a mixed number?

Answers

Answer:

its an improper

mixed : 9 14/15

Step-by-step explanation:

its a mixed number if the number at the tops in the limit and there is a number at the side that represents whole number(s)

Answer:

the answer is 9 14/15

Step-by-step explanation:

Step 1 - Find Whole Number

Calculate out how many times the denominator goes into the numerator. To do that, divide 149 by 15 and keep only what is to the left of the decimal point:

149 / 15 = 9.9333 = 9

Step 2 - Find New Numerator

Multiply the answer from Step 1 by the denominator and deduct that from the original numerator.

149 - (15 x 9) = 14

Step 3 - Get Solution

Keep the original denominator and use the answers from Step 1 and Step 2 to get the answer. 149/15 as a mixed number is:

PLEASE I NEED AN ANSWER NOW WILL MARK U BRAINLIEST!!!1!
how do u find y intercept without a graph for systems of equations? (y = x - 6)

Answers

Answer:

-6 is the y intercept.

the number added or subtracted from the x in the slope intercept form is always the y intercept

Step-by-step explanation:

plz mark me brainliest

The total cost of renting a banquet hall is a function of the number of hours the
hall is rented. The owner of the banquet hall charges $45 per half hour up to a
maximum of 5 hours and a $50 cleaning fee. The equation used to express the
situation is C = 45h + 50, where h is the number of half hours. What is the
greatest value in the range for this situation?

Answers

9514 1404 393

Answer:

  $500

Step-by-step explanation:

The greatest rental time is 5 hours, which is 10 half-hours. The value of C for h=10 is ...

  C = 45·10 +50 = 450 +50 = 500

The greatest value in the range for this situation is $500.

I need help with this​

Answers

Answer:

24.3470022334

Step-by-step explanation:

I hope this helps. It really isn’t too hard. All you need to do is find the multiples of 24

y = m + mnp
Solve for n.
pls help me

Answers

Answer:

n = y - m/mp

Step-by-step explanation:

y = m + mnp

y - m = mnp

y - m/mp = mnp/mp

y - m/mp = n

can someone answer the questions on my page if so ill give all the correct answers brainlist.

Answers

Oh okay that’s a bet
Other Questions
Which phrase best completes the list?Types of Expenses-MortgagesAre a type of loan given by a bankShould take up 30 percent or less of a personn's incomeO A. Allow a person to buy a homeOB. Are paid to the governmentOC. Do not need to be paid monthlyOD. Pay for vital services like water Sharon makes bracelets and necklaces to sell at the school fair. She makes a total of 40 bracelets and necklaces. She makes 3 times as many bracelets as necklaces. Which system of equations can be used to determine how many bracelets, x, and how many necklaces, y, she m what is widow marriage (ELA) If your teacher asks you to paraphrase a section of the president's speech, you shouldA. explain why the president gave the speech.B. explain how you feel about that section of the speech.C. repeat that section of the speech, word for word.D. repeat that section of the speech in your own words. What is the mass of a lead block that has a volume of 30 mL?O 3.39 gramsO .377 mLO 265 mLO 339 grams What are the possible degrees for the polynomial function? What does the underlined word mean in the following sentence?The archeologists built a tunnel inside la piramide that leads to the jaguar throne.O cubeO pyramidO triangleO perimeter Calculate the average time it took the car to travel 0.25 and 0.50 meters with two washers attached to the pulley. Record the averages, to two decimal places, in Table C of your Student Guide.What is the average time it took the car to travel 0.25 meters? seconds What is the average time it took the car to travel 0.50 meters? seconds In which genre will you find ironic expressions used to comment on some reality or fact?A. la stiraB. el dramaC. la biografaD. la novela policial (1) A sandwich shop serves 4 ounces of meat and 3 ounces of cheese on each sandwich. After making sandwiches for an hour, the shop owner has used 91 combined ounces of meat AND cheese. How many sandwiches were made? So i wanna know how much were made and not how much of everything is of cheese and meat got it? okay thank you ^^ For nitrogen to be a liquid, its temperature must be within 12.78 F of 333.22 F. Which equation can be used to find the maximum and minimum temperatures at which nitrogen is a liquid, x?The equation that can be used to find the maximum and minimum temperatures is [tex]\sqrt{x + 12} = x+5[/tex] 30% increase on $50help I need the answer nowww Structures in plant leaves that open and close to maintain homeostasis are called _____. Firestop Inspectors are encouraged to look for empty containers to confirm that a. The appropriate materials are being used b. The installed material containers are in sufficient quality to have been installed correctly c. The site is kept clean and containers are disposed of properly D both A and b Why does sound travel more quickly through a solid than through a liquid or a gas? 2. Which verses have more than 11 syllables? What do you have to do to make them have 11 syllables? Put the verses here and show your work: I can't have you or leave you I don't even know why, when I left you or when I had you, there is an I don't know what to love you and many yes I know what to forget you. Well, you don't want to leave me or make amends, I will temper my heart with luck that half is inclined to hate you Even if the other half is inclined to love you If it is force to love us, there is a way, what is dying to always be quarreling: no more talk in heat and suspicion, and whoever gives half, does not want the whole; and when you're doing it for me, You know I'm doing the undone Aurangzeb was a man of his time, not ours? what does it mean Which contact field is used to control the name that would appear in the To field of an email message when a user is sending a message to a contact?Display AsFile AsSave AsFull Name who is roman reigns.............?