Explain what their first step would be if they wanted to eliminate the y variable from the equations.

Explain What Their First Step Would Be If They Wanted To Eliminate The Y Variable From The Equations.

Answers

Answer 1

Answer:

r1 +4×r3 ⇒ r1r2 -3×r3 ⇒ r2

Step-by-step explanation:

We note that the coefficient of y in equation (iii) is 1, so it is convenient to use that equation to eliminate y from the others.

__

To eliminate the y-variable from equation (i), four times equation (iii) can be added to equation (i).

To eliminate the y-variable from equation (ii), three times equation (iii) can be subtracted from equation (i).

_____

The result of these operations would be ...

  [tex]10x +6z = 28\quad\text{(iv)}\\\\-7x-9z=2\quad\text{(v)}[/tex]


Related Questions

can someone pls help

Answers

Answer:

no, no, yes, no

Step-by-step explanation:

Starting with <EDG=43

You need to find <CDF. AB is a straight line, making it 180.

ADC=90 and FDB=20

180-90-20 to get CDF

70=CDF 70 doesnt equal 43

CDF and EDG are not congruent.

Find EDA. GC=180 ADC= 90 EDG=45

180-90-45

45

you can also see that ADC and EDG are adjacent angles and if you look, GDA makes up a right angle which is 90 so you could subtract the 45 from that to get 45 as well.

ADB=180

45+133=178

no

We already figured out that CDF=70

70+20=90 so yes.

BDG is obviously a right angle but looks can be deceiving so math wise

AEG is 90 and AB is 180

180-90=90

so BDG is 90

20+90+43=180

155=180

no

please help!!

some of the following expressions are rational , circle which ones are rational

a) -99/9
b ) √ 4/4
c ) √ 2/2
d ) √ 16/4

Answers

A,b and d are rational

When reduced, the numbers are
A)-11
B)v1 or 1
C)v2
D)v4 or 2

A number is rational if it can be represented by a fraction. All of these can be(besides c). The square root of 2 is unable to be represented in a fraction form just like pi so it is an irrational number, not a rational number. However, all of these are considered real numbers

what is the solution of the equation 3-8x=8/5x written as a fraction?

Answers

Answer:

x=5/16

Step-by-step explanation:

3-8x=8x/5

(3-8x)5=8x

15-40x=8x

15=8x+40x

15=48x

x=15/48

x=5/16 ans.

(14a^4b^3 - 20a^2b^2 + 2ab) x (2ab)^-1

Answers

I’m tryna answer a questionnn

Solve the equation 2/3 -4 + 7/2 = 9x + 5/6

Answers

Answer: -2/7
decimal form: -0.074
hope this helped

Is the square root of -1/4 rational.or irrational

Answers

Answer:

the square root of -1/4 is irrational

What is the mean in 74,75,80,76,75,81,78?

Answers

Answer:

77

Step-by-step explanation:

Add all the numbers up, then divide it by how many numbers there are in the set.

the product of 23 and 3.324 is greater than 23

Answers

Answer:

23*3.324 is 76.452 yes

Step-by-step explanation:

The answer is true because 23 times 3.324 is equal to 76.452. (The word of always means to multiply in math) 76.452>23.

What is the product?

Answers

Answer:

2x^2 +5x-3

Step-by-step explanation:

(x+3)(2x-1)

FOIL

first :(x*2x) = 2x^2

outer: x*-1 = -x

inner: 3*2x = 6x

last: -1 *3 = -3

Add together

2x^2 -x+6x-3

Combine like terms

2x^2 +5x-3

Answer:

The third option. 2x^2+5x-3.

Step-by-step explanation:

The product means to multiply them.

(x+3)(2x-1)

You don't multiply x to 2x and 3 and -1.

That is not the product and say it is 2x^2-3.

You have to multiply x to both 2x and -1.

You don't only multiply the terms that correspond with each other.

You have to do x times 2x and x times -1.

2x times x is 2x squared or 2x^2.

x times -1 is -x.

So you have 2x^2-x.

Leave that there for now.

Now, you have to multiply 3 with 2x and -1.

3 times 2x is 6x and 3 times -1 is -3.

Then you have 6x-3.

Bring back the 2x^2-x with the 6x-3.

Now you have 2x^2-x+6x-3.

You always have to simplify.

Combine like terms. -x plus 6x is 5x.

Therefore, you are left with 2x^2+5x-3.

That is the product of (x+3)(2x-1).

you can check by dividing the polynomials as well.

I hope this clarifies things!

What is the Measure of angle DBE?

I need the answer please help !!

Answers

Answer:

37

Step-by-step explanation:

Greetings! Hope this helps!

Answer

37 degree's

Have a good day!

_______________

A brainliest would help tons! :D

Marissa wants to babysit to earn some extra money. She already has $250 in her bank account. The equation f(x) = 22x + 250 can be used to find the total amount of money in her bank account, y, after x hours of babysitting. What does the 22 represent in the equation?

Answers

Answer:

22 represents how much she gets paid by the hour

Answer:

22 represents how much she gets paid by the hour

Step-by-step explanation:

How many significant figures are there in 0.009807

Answers

Answer:

4

Step-by-step explanation:

The Significant Figures are 9 8 0 7

The populations of two towns, town A and town B, are being compared. The population of town A is 4×10^4 and the population of B is 2×10^5. How many times greater is the population of town B than town A?

Answers

Answer:

5 times

Step-by-step explanation:

Given that,

The population of town A is 4×10⁴

The population of town B is 2×10⁵

Let the population of town is B is x times of the town A. So,

[tex]A\times x=B\\\\x=\dfrac{B}{A}\\\\x=\dfrac{2\times 10^5}{4\times 10^4}\\\\x=5[/tex]

It means that the population of town B is 5 times of the population of town  A.

Answer:

5 times you heard the man

Step-by-step explanation:

3(y+7)+8y plz be spacific and answer correctly, im counting on you. :)

Answers

Answer:

11y + 21

Step-by-step explanation:

mutipily 3 by y + 7 bc 3 is right outside of the parentheis which means to mutipily. Then u get 3y +21 +8y. then simpilfy

There is a ratio of 5 girls to 3 boys in the chorus. There are 24 boys in the chorus. How. many girls are in the chorus?

Answers

Answer:     40

Step-by-step explanation:

5/3    24/?

    divided by 8 =24 divided by 8 =3

                     5 x 8   =40  

Hope this helps :)

Answer:

40 girls

Step-by-step explanation:

15. A photoelectron experiment is performed on a sample of silicon using photons with an energy


of 1.43 x 105 kJ/mole. Photoelectrons are generated that have a kinetic energy of 1.34 x 10


kJ/mole. What was the ionization energy of these electrons?

Answers

Answer:

9.0×10^3K/moles

Step-by-step explanation:

ionization energy of these electrons = Energy of photons - kinetic energy of the electrons

Given

Kinetic energy of electron = 1.34×10^5

Energy of photons = 1.43 x 105 kJ/mole

Required

Ionization energy of these electrons

Ionization energy of these electrons = 1.43×10^5-1.34×10^5

ionization energy of these electrons = 0.09×10^5 kJ/mol

= 9.0 × 10^3 kJ/mol

Hence the ionization energy of these electrons is 9.0×10^3K/moles

19+a= -50 answers below are
a = -950 a = -50/19 9= -31 a= -69

Answers

Answer:

a=-69

Step-by-step explanation:

You want to get A alone. So you want to move 19 over to the other side. Making you want to subtract from both side canceling on the left side and making the -50 to a -69. Making it a=-69.

PLEASE HELP Ruby has a choice between three savings accounts. Savings account A has an APR of 3.9742% compounded monthly, savings account B has an APR of 3.9886% compounded quarterly, and savings account C has an APR of 3.9998% compounded semiannually. Ruby wants to choose the savings account with the highest APY.
Part I: If r is a savings account's APR and n is the number of compounding periods per year, what expression gives the savings account's APY?
Part II: What is the APY of savings account A to four decimal places?
Part III: What is the APY of savings account B to four decimal places?
Part IV: What is the APY of savings account C to four decimal places?
Part V: Which savings account offers the highest APY?

Answers

Answer:

  I. APY = (1 +r/n)^n -1

  II. 4.0474%

  III. 4.0487%

  IV. 4.0398%

  V. Account B

Step-by-step explanation:

I. The expression is ...

  APY = (1 +r/n)^n -1

__

II–IV. See the attached. (When calculations are tedious and repetitive, a spreadsheet is helpful.)

__

V. The account compounded quarterly has the highest APY, account B.

Given AC with A(3, 4) and C(-9, -2), if B partitions AC such that the ratio of AB to BC is 1:5, find the coordinates of B.

Answers

Answer:

Step-by-step explanation:

If TM = 2x + 5, MQ = x + 14, find the value of x.

Answers

Answer:

x=14:^$^$^$$&$&6373££33€¥÷€$^^%;";",,"¥4¥£=£÷£3883393992

Atul has 2/3 lb of candy. Jose has 3/5 lb and Maria has 1/2 lb less than Jose.
How many more pounds of candy does Atul have than Maria?

Answers

Atul has 1/6 more pounds of candy than Maria. First you find a common denominator for 2/3 and 1/2, a common denominator would be 6.

2 x 2 = 4
3 x 2 = 6

1 x 3 = 3
2 x 3 = 6

4/6 - 3/6 = 1/6

Can someone help me with this? Its due in 30 minutes and I need help

Answers

Answer:

Quadrants I and II.

O: (-2, 2)

N: (-2, 4)

M: (1, 4)

P: (1, 2)

Step-by-step explanation:

When rotating about the origin 90 degrees in a counterclockwise direction, focus on the coordinates of one point on the preimage at a time. So, the x-coordinate on the image will be the opposite of the y-coordinate of the preimage, and the y coordinate of the image will be the x-coordinate of the preimage. That sounds complicated so here is an example from the problem.

O is a point on the preimage. Its coordinates are (2, 2). To find the x-coordinate, take the opposite of the image's y-coordinate. The y-coordinate is 2, so it will be a -2 x-coordinate on the image. To find the y-coordinate on the image, take the x-coordinate of the preimage (O). The x-coordinate of O is 2, so the y-coordinate of the image will be 2. Combine those together and after a 90 degree counterclockwise rotation, you get a point of (-2, 2)

Answer:

Step-by-step explanation:

when rotate counterclock wise 90 degrees:

(x,y)⇒(-y,x)

points                            (2,2)        (4,2)          (2,-1)          (4,-1)

CCW90 degrees           (-2,2)      (-2,4)         (1,2)           (1,4)

CCW 270 degrees        (2,-2)       (2,-4)        (-1,-2)         (-1,-4)

(x,y)⇒(y,-x)   the shape will be in quadrant 3 and 4

   

The basic concepts of line" and "point" can be used to define a ray A ray is a portion of a line that starts at a point and extends in a particular direction How can this definition of a ray be used to formulate a definition of an angle?

Answers

Answer:

Angle is a point view. side view, front view, back view and simmangu sunggu

please help me explain how this is wrong

Answers

Answer:

Step-by-step explanation:

Jim though this:eight thousandths looks like this .0008

Lou thought this:eight hundredths looks like this .008

So that means Jim Would have been correct in picking the Larger number.

Answer:

Jim is correct

Step-by-step explanation:

Jim is correct because 8 hundreths as a decimal can be written as 0.08. 8 thousanths as a decimal is 0.008. We can see that even though thousandths seems bigger than hundreths, in decimals, the higher it seems, the lower it actually is(0.08>0.008)

Please help!!!!!!

If the table shows the equation yo , what is the missing value?
X
ху
217
15 ?
62
03
06
05
04

Answers

The answer is 5 my friend, 15/3 =5.

Answer: 5

Step-by-step explanation:

21 is 3 times greater than the number 7.

So, we will divide 15 by the number 3.

15 / 3 = 5

We get the answer as 5.

1. A rectangular field has one side fence 500 meters long, and another side fence
700 meters long
What is the length of a diagonal across the field?
b. What is the angle between the diagonal and the long side fence?
a

Answers

Answer:

[tex]d=860.23\ m[/tex]

[tex]\theta=35.54^\circ[/tex]

Step-by-step explanation:

Rectangles

The sides of the rectangular fields are 500 meters and 700 meters. The diagonal of the rectangle can be calculated as the hypotenuse of the right triangle formed by the two sides, thus:

[tex]d=\sqrt{x^2+y^2}[/tex]

Where x and y are the lengths of the sides. For the rectangular field, we have:

[tex]d=\sqrt{500^2+700^2}=\sqrt{250000+490000}=\sqrt{740000}=860.23\ m[/tex]

The angle between the diagonal and the longest side can be calculated using trigonometry. Please refer to the image attached.

[tex]\displaystyle \cos\theta=\frac{x}{d}=\frac{700}{869.23}=0.8137[/tex]

[tex]\boxed{\theta=35.54^\circ}[/tex]


Function
Which ordered pair is on the inverse of f(x)?
(4,-2)
(-2,-2)
(-1,-2)

Answers

Answer: C: (-1,-2)

Step-by-step explanation:

Just answered it

place these numbers in order from least to greatest: 2.03 2.3 2.003

Answers

Answer:

2.3,2.03,2.003

Step-by-step explanation:

i need points

2.003,2.03,2.3. This is the answer

8(4-x)=7x+2 Solve for X.

Answers

Answer:

x = 2

Step-by-step explanation:

8(4 - x) = 7x + 2

32 - 8x = 7x + 2

-8x = 7x - 30

-15x = -30

x = 2

Best of Luck!

Write the fraction in simplest form. 12 48​

Answers

Answer:

1/4

12/48 simplifies to 1/4 .

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