PLEASE HELP ASAP WILL CHOOSE BRAINLIEST FOR CORRECT ANSWER GIVING 20 PTS

System A-
-x-2y=7
5x-6y=-3
Solution: (-3, -2)

Choose the correct option that explains what steps were followed to obtain the system of equations below.

System B:
-x-2y=7
-16y=32

A. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 3. The solution to system B will be the same as the solution to system A.
B. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by -6. The solution to system B will not be the same as the solution to system A.
C. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by -5. The solution to system B will not be the same as the solution to system A.
D. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 5. The solution to system B will be the same as the solution to system A.

please helpp and take ur time

Answers

Answer 1

Answer: A. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 5. The solution to system B will be the same as the solution to system A.

System A :

-x - 2y = 7 ..........(1)

5x - 6y = -3 ..........(2)

If we multiply the first equation by 5, then we will get :

5(- x - 2y) = 5(7)

⇒ - 5x - 10y = 35 ........... (3)

Now the Sum of equation (2) and equation (3) is:

⇒ Sum :  

Now if we replace the second equation in system A with this  , then we will get the system B.

Solution of system B:

First we will take the second equation as there is only one variable 'y'. So, we will solve that equation for 'y'

Now for solving 'x', we will plug y= -2 into the first equation

So, the solution of system B is (-3, -2), that means the solution of both systems are same.

Step-by-step explanation:

Answer 2

Answer: D:

To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 5. The solution to system B will be the same as the solution to system A.

Step-by-step explanation:


Related Questions

After 3 new students joined a class, the class had 30 students. Write an equation in which you can find n, the number of students in the class before the 3 new students joined.

Answers

Answer:

30-3=n

Step-by-step explanation:

Hope this helps!

Answer:

x+3=30

Step-by-step explanation:

There are x number of students, then 3 students were added to the class. Now there are 30 students.

if x Multiplied by 7 = 21, what is x

Answers

Step-by-step explanation:

Given that x is multiplied by 7 = 21 Then

7 * x = 21

or x = 21/ 7

Therefore x = 3.

Answer:

Solution,

here,

x+7=21

x=21-7

Therefore,x=14

Plot A(0, 0), B(1, 0), C(1, 2), D(2, 0), and E(2, 4). Then sketch ∆ABC and ∆ADE. By what postulate or theorem could you show that ∆ABC and ∆ADE are similar? A. AA Similarity Postulate B. SAS Similarity Theorem C. SSS Similarity Theorem D. Any of the above could be used to show that the triangles are similar.

Answers

Answer:

1) Please find attached the given plot and sketch of the points created with Microsoft Word

2) The correct option is;

A. AA Similarity Postulate

Step-by-step explanation:

1) Please find attached the given plot and sketch of the points created with Microsoft Word

2) The given parameters are;

The coordinates of the points are A(0, 0), B(1, 0), C(1, 2), D(2, 0) and E(2, 4)

Therefore, we have;

The length of segment AB = 1

The length of segment BC = 2

The length of segment AD = 2

The length of segment DE = 4

Therefore, we have;

∠ABC = ∠ADE = 90°

∠BAC = = artctan(2/1) = ∠DAE = artctan(4/2) = 63.435°

Therefore, ΔABC and ΔADE are similar by AA Similarity Postulate

Kiran paid $54.00 for 3 tickets to go to a corn maze. At the same rate, what is the cost of 5 tickets to the maze? *

Answers

Answer:90

Step-by-step explanation:

Answer: $90

Step-by-step explanation:

You can set up a proportion.

$54 = 3 tickets

x = 5 tickets

To find x, multiply 54 and 5.

54 × 5 = 270

Then divide 270 by 3.

270 ÷ 3 = $90

Since we figured out x = $90, this means that it costs $90 for 5 tickets.

hope this helps!!

Please help me with this !!! Thank you

Answers

Answer:

messages me i will explain how to solve if i can

-6 -3x=5x -4x can somebody solve this ?

Answers

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

x = −3/2

Decimal Form:

x = −1.5

Mixed Number Form:

x = −1/1/2

Answer #1 and #2 for Brainliest! Plz answer if you know and not just for points

Answers

Answer:

#1:  A

#2:  2

I apologize if its wrong

Answer: A, 5

Explanation:

Simply create an slope-intercept equation using the given information. The initial fee is $5, which is the y-intercept and $2.75 every stop, which is our slope. The equation is y = 2.75x+5. Since this is an inequality and she's looking for the most amount of stops she can take before maximizing her budget, it needs to be a less than or equal to sign. Change the equation to be 5+2.75S≤21. Subtract 5 from both sides to get 2.75S≤16. Divide 2.75 to both sides to get S≤5.82. This would be estimated to around 5 stops, which would be the largest amount of stops.

Austin has a square pool that measures 6 meters on each ude The pool is surrounded by a cement border that meayures 0.5 What is the area of the cement border (not including the pool of course)? HELP ASAP​

Answers

Answer:

5

Step-by-step explanation:

6 mis 1 is 5

Plz help me
Write an equation in standard form Juan can ride his bike at 12 mi/h and walk at 4 mi/h. Write an equation that relates the amount of time he can spend riding or walking combined, to travel 20 miles.

Answers

Answer: 12+4+4

Step-by-step explanation:

Because if you add those together you get 20 miles per hour

What is the answer? 2c-5 C=4

Answers

Answer:

2(4)-5=3

we know that C is going to be multiplied by 2 and the value of C=4

so 2*4 = 2(4)

2(4)-5

2*4=8

8-5=3

So, the answer is 3

BRAINLIEST!! Can someone help me with the following problem?


(- 2*10+2)/3 +14*2-5+9=y

Solve for "y" :)

Answers

I believe that the answer is 26 but I’m not completely sure
Have a nice day :)

2 The density of a substance can be determined
by finding the unit rate that compares mass to
volume. A nugget of gold has a mass of
463.2 grams and a volume of 24.0 milliliters.
What is the density of gold?
F 11,116.8 g/mL
G 439.2 g/mL
H 0.052 g/mL
J 19.3 g/mL

Answers

Answer:

88888

Step-by-step explanation:

6201005050

Find the slope of the line.​

Answers

Answer:

the slope is 1

Step-by-step explanation:

Slope is 1 hope that helps!

*BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST**

Determine whether or not each expression below is a perfect square. Explain why the expression is or is not a perfect square. If it is not a perfect square, find the perfect square that seems “closest” to the given expression and show how the perfect square can be adjusted to be the given expression.

1. A(x)=x^2+6x+13

2. A(x)=2x^2+8x+14

Answers

Step-by-step explanation:

These aren't a perfect square bec. 1 st and 3rd terms must be perfect square

A(X) = X^2+6X +13 be perfect square if 13 Changed to 9

= X ^2+6X +9

A(x)= 2X^2+8X +14 be perfect square

= 4X ^2+ 8X + 16

Justin makes a necklace for his sister. Twelve beads take up 4 inches of
string. How many beads fit on 1 foot of string? Explain your answer.
1 point

Answers

Answer:

36

Step-by-step explanation:

12 inches are in a foot, 12 inches/4 inches=3, 12x4=36

Triangles XYZ and RST are similar. XY
is 24 inches, YZ is 16 inches, XZ is
12 inches, RS is 18 inches, and RT is
9 inches. Find the length of ST.

Answers

Answer:

ST = 12

Step-by-step explanation:

18/9 is similar to 24/12

taking one of those as a basis, if:

24-------18

16--------ST

24*ST = 16*18

24ST = 288

ST = 288/24

ST = 12

explain how it is possible that all proportional relationships are linear functions but not all linear functions are proportional relationships.

Answers

Proportional and linear functions are almost identical in form. The only difference is the addition of the “b” constant to the linear function. Indeed, a proportional relationship is just a linear relationship where b = 0, or to put it another way, where the line passes through the origin (0,0).

You’re welcome

Reagan and Nathan are 40 miles apart on a bike trail when they start pedaling toward each other on their b bicycles. Reagan rides at a constant speed of 8 miles per hour, and Nathan rides a constant speed of 10 miles per hour. How long does it take until Reagan and Nathan meet?

Answers

Answer:

They meet in 2.22 hours.

Step-by-step explanation:

We can find the time at which Reagan and Nathan meet by equaling the time as follows:

[tex] v_{R} = \frac{x_{R}}{t} [/tex]  

[tex] x_{R} = v_{R}t [/tex]    (1)      

[tex] v_{N} = \frac{x_{N}}{t} [/tex]  

[tex] x_{N} = v_{N}t [/tex]   (2)

Where R is for Reagan and N for Nathan.

Knowing that:

[tex] x_{R} + x_{N} = 40 mi [/tex]

By adding equations (1) and (2) we have:

[tex] x_{R} + x_{N} = v_{R}t + v_{N}t [/tex]

[tex] t = \frac{x_{R} + x_{N}}{|v_{R}| + |v_{N}|} = \frac{40 mi}{8 mi/h + 10 mi/h} = 2.22 h [/tex]

Therefore, they meet in 2.22 hours.        

I hope it helps you!                                                                                                                                                                                                 

Answer:

2.22

Step-by-step explanation:

poop


Write some numbers that are equal to 15:12.

Answers

Answer:

3:4, 30:24, 60:48

Step-by-step explanation:

Answer:

30:24

45:36

60:48

75:60

90:72

105:84

120:96

135:108

150:120

Step-by-step explanation:

hope it helps

1. Use the following graph to determine the coordinated of the y-intercept.
A. (5,0)
B. (4,0)
C. (0,4)
D. (0,5)

HURRY!!! Please.

Answers

Answer:

I believe it's C. (0.4)

Step-by-step explanation:

i’m really confused please help

Answers

Answer: probly d

Step-by-step explanation:

a ,b ,and c are subtracting makeing it hard top get something that was not in the problem

Each cup holds 1/5
liter of water. There are 6 cups.

a. Draw a diagram representing the situation.

b. How many liters of water do the 6 cups hold?

Answers

Answer:

can't draw it but it should look something like 6 glasses that are half of half full. in total they hold 1.2 liters

Step-by-step explanation:

Answer:

that would be at least 1.41

Step-by-step explanation:

beucase 6 cups = 1.41

Mark me Brainliest!

It is 2020,What year would the next harvest moon be?Also when is the next blue moon as well?(Btw this is and addition problem)

Answers

Answer:

I am pretty sure the next blue moon is October 31, 2020

and the last harvest moon was on September 28, 2015, in 2025 will be the next harvest moon.

Help need to know if I did this right question in the picture

Answers

Answer:

You need to post a picture for an evaluation of your performance.

Step-by-step explanation:

sir i need the pic lol

A factory is manufacturing cell phones that must each have a thickness of 0.5±0.001 inch. Which inequality describes the acceptable range of x, the thickness in inches of a cell phone?

Answers

A factory is manufactuaring cell phones that must each have a thickness of 0.5+/-0.001 inch. Which inequality describes the acceptable range of x, the thickness in inches of a cell phone?

A. 0.499 ≤ x ≤ 0.501

B. x ≤ 0.49 or x ≥ 0.51

C. x ≤ 0.499 or x ≥ 0.501

D. 0.49 ≤ x ≤ 0.51

I believe it was C

Which is the graph of the linear inequality x – 2y > –6?

Answers

Answer:

uhhh d????

Step-by-step explanation:

Graph D represents the  linear inequality x – 2y > –6.

The given inequality is x – 2y > –6.

We rearrange the inequality as y < (1/2)x + 3

Now we have the inequality in slope-intercept form, y < mx + b, where m is the slope (1/2) and b is the y-intercept (3).

To graph this inequality, you can start by plotting the y-intercept, which is the point (0, 3).

The slope of the graph is 1/2.

However, the inequality is y < (1/2)x + 3, which means the shaded region is below the line.

Hence, graph D represents the  linear inequality x – 2y > –6.

To learn more on Inequality click:

https://brainly.com/question/28823603

#SPJ7

Can someone help me? (look at image)

Answers

Answer:

L (-2, -3)  K(-2,-4)  I (3,-1)  J (2,-4)

Step-by-step explanation:

I' = (3,-1)

J' = (2,-4)

K' = (-2,-4)

L' = (-2,-3)

a linear function has a y-intercept of -12 and a slope of 5 what is the equation of the line ​

Answers

Answer:

y=5x-12

Step-by-step explanation:

y = mx+b

hope this helps. i am in algebra two so you can trust my answer. Happy holidays stay safe

it is x  because you have a y factor and you need an x factor.

A certain relationship is defined as having only one corresponding y-value for each x-value. Which of the following best describes this relationship?
A.
variable
B.
expression
C.
function
D.
equation

Answers

Answer:

We conclude that a function is defined as having only one corresponding y-value for each x-value.

Hence, option (C) is true.

Step-by-step explanation:

We know that A function is a certain relationship is defined as having only one corresponding y-value for each x-value.

Considering the function

f(x) = x+1

Here,

x is the input and f(x) or y is the output. 'x' is often called an independent value and y is called the 'dependent' value.

Considering the table

x                      y

1                      2

2                     3

3                     4

4                     5

The values in the table satisfy the function y = x+1.

It is clear from the table that the function has only one corresponding y-value for each x-value. In other words, there is no repetition of 'x' value.

Therefore, we conclude that a function is defined as having only one corresponding y-value for each x-value.

Hence, option (C) is true.

Someone help meeee please

Answers

Answer:

The equation of the line is -5/4

Step-by-step explanation:

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