Mathematics Middle School

Which of these systems of equations would be best solved using the subtraction​ method?
I. 2x−7y+3y = 4 −6x−4y = −52
II. 2y = −5x+6x−5 y = 2x−6
III. −7x+3x+2y = 4 4x−6y = −52

Answers

Answer 1

Answer:

Step-by-step explanation:

1. x+2y=6 or x=6-2y

3x-2y=2

3(6-2y)-2y=2

18-6y-2y=2

18-8y=2

-8y=-18+2

-8y=-16

y=-16/-8

y=2 ans.

x+2*2=6

x+4=6

x=6-4=2 ans.

Proof:

3*2-2*2=2

6-4=2

2=2

I leave the rest for you to practice with.

3. 4x+y=7

2x+5y=-1

 

5. 3x+2y=-2

6x-y=6

Solve the system using the elimination method. Show all your steps.

7. -3x+3y=3

3x+y=9 add.

---------------------------------

4y=12

y=12/4

y=3 ans.

3x+3=9

3x=9-3

3x=6

x=6/3

x=2 ans.

Proof:

-3*2+3*3=3

-6+9=3

3=3

I'll leave the rest for practice.

9. -5x+12y=20

x-2y=-6

11. 3x+2y=1

4x+ 6y= 7

Related Questions

HELPP I NEED THIS ASAP

Answers

Answer:

you have it done? what do you need

Step-by-step explanation:

Please give a full explanation and answer on this

Answers

I think it’s Idek I’m dum

Joe wants to paint a diagonal line across a sign over the door of his office. The sign measures 8 ft. by 6 ft. How long will the diagonal line be?

Answers

the line would be 48 feet long because 6x8 = 48

Answer:

10 ft.

Step-by-step explanation:

By using the pytahgorean theorem a² + b² = c² we can determine the answer of 10 ft. If you do not know already the length and width are the a and the b so a=6 and b=8. by squaring both of these we get a=36 and b=64 (squaring is just the number times itself so 3² would be 3x3) by adding both of these squared values we get 64+36=100 which means that c²=100 so to get our final answer we just take the square root of c² which is the opposite of squaring it. So √100=10 and that is our final answer

1. Evaluate the expression (6 + 4) x 3 − 4 ÷ 2 using PEMDAS.

16
28
31
37

2.Select the statement that describes the expression one half x (12 ÷ 3) + 8.

one half the quotient of 12 and 3, then subtract 8
one half the quotient of 12 and 3, then add 8
one half the product of 12 and 3, then add 8
one half the difference of 12 and 3, then subtract 8

3. Solve the expression 9 + (20 x one fourth) − 6 ÷ 2 using PEMDAS.

8
11
13
16

Answers

Answer:

1) B, 28

2) A

3) B, 11

Step-by-step explanation:

PEMDAS, and simple math.

What is the name of your profile pic character?

Answer:

1. 28

2. One half of the quotient of 12 3, then add 8

3. 8

What is the Mean Absolute Deviation of the following set of numbers?


16, 21, 17, 22, 16, 16


A) 2.15 B) 2.28 C) 2.33 D) 2.47

Answers

Answer:

B 2.28

Step-by-step explanation:

please mark brainliest answer so i can rank up

C is the correct answer I checked it on my calculator

i need help asap plsss

Answers

Radius = 5 cm

Height = 8 cm

Volume = πr²h

Volume = π(5 cm)² × 8 cm

Volume = π × 25 cm² × 8 cm

Volume = 200π cm³

The answer is C 200 hope that helps

Which value of x makes the equation 3x = 36 true?
A. 10
B. 12
C. 14
D.16

Answers

Answer:

B, 12

Step-by-step explanation:

there are many ways to solve this problem, I will state 2:

divide 36 by 3, your answer would be 12

simply multiply 3 by each number on the question, your answer as well will be 12.

can some one help me asap like pls hurry. and pls some one answer all

Answers

Answer:

10.) J.

11.) D.

12.) G.

13.) B.

14.) i don't know  what this one is sorry

15.) i don't know

16.) H.

sorry if there not right

Step-by-step explanation:

a car travels 45 miles and uses 3 gallons of gas. what is the unit rate for miles per gallon. HELP

Answers

Answer:

15 miles per gallon

Step-by-step explanation:

If a car travels 45 miles and uses 3 gallons of gas than to find how many miles can be traveled using 1 gallon, you do 45/3, miles/gallons to get 15 miles/1 gallon.

Hope this helps,

-Shaylee

15 miles per gallon hope this helps

how has your last two minutes been?

Answers

Getting A’s and trying to get points.

Translate quadrilateral ABCD 3 units to the right and 4 units down. What are the coordinates of the vertices of the image?

Answers

Answer:

there is no image, if you link an image i will edit my answer.

Step-by-step explanation:

Answer:

(3,4) hope i helped you 3 right 4 down

Three less than on-half a number is -71

Answers

Your Answer:

B. 1/2n-3

Explanation:

One way to get half a number is to multiply it by 1/2.

The phrase "a number less than an other number" often indicates subtraction.

B. That would be the correct choice. Have a wonderful day

Below is a blue rectangle with a width of 27.5 cm and a length of 33 cm. An orange rectangle with a width of 15 cm and a length of 20 cm is placed on top of the blue rectangle


What is the area of the orange rectangle?


What is the area of the blue rectangle?


What percentage of the blue rectangle is covered by the orange rectangle?

Answers

orange: 300
blue: 907.5

explanation: area is length time width. take those values and multiply

help me with this please please pleasee

Answers

Answer:

37.79924

Step-by-step explanation:

37.79924 that will be your answerw

Please help me I need help 25 points and brainiest

Answers

Answer:

Volume equals 1632

Step-by-step explanation:

V=Bh

B=base area, to get B use the equation πr².

H= height  

Side A= 12

Side B= 10

Side C= 10

For the height we will use 34, or the height of the prism.

48*34 equals 1632, And your volume is 1632.

20 points
Use either the commutative property or combine like terms to create an equivalent expression to from the equation 9 x j(2 + 5).

Answers

The answer should be “93j”
90j ? Sorry if I’m wrong!

Maria rolled a number cube, numbered from 1 through 6, 100 times and recorded the results in this table.
Based on the table, what is the experimental probability of rolling a 2?

a. 1/50
b. 20/100
c. 2/100
d. 20/50

Answers

Answer:

b

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Do 20 divided 100 to find probability

do NOT worry about the number under the black one just worry about the top one ok
go in order of how I put them up here please and thanks whoever gives me the best answer and who answers all five gets brain list
NO LINKS UNLESS IT IS FROM A LEARNING SITE

Answers

Answer:

1. : a-2/6

is the answer

Step-by-step explanation:

For the situation, write and solve an equation. Then, explain what your solution means. If you get stuck, try drawing a diagram on your paper.



A food pantry is making packages. Each package weighs 64 pounds. Each package contains 4 boxes. Each box contains a 7-pound bag of beans and a bag of rice. The bags of rice are all identical.

Answers

Answer:

64 = 4x + 7        

Simplify the expressions by combining like terms

-4f - 9 - f + 15

Answers

Answer:

-5f    +6

Step-by-step explanation:

-4f - 9 - f + 15

Combine like terms

-4f -f    -9 +15

-5f    +6

Answer:

-5f+6

Step-by-step explanation:

as we add like terms -4f+(-f)=-5f

-9+15=6

EXPERT HELP: EXPLAIN THE ANSWER

Answers

A. Mean deviation is the range of the mean essentially.

Hope it helps

Please help my with this question!!! I’ll give brainlist for the correct answer

Answers

Answer:

I think its C

Step-by-step explanation:

Answer:

The answer is c

Step-by-step explanation:

Help plz
Is this a statistical questions?
What are the heights of all the players on the Atlanta Hawks basketball team?

Answers

Answer: Yes it is

Step-by-step explanation:

Answer :Yess

Step by step:

HELP PLEASSEEEEE!

1) Tori buys wooden picture frames, paints them, and sells them. A-frame and the necessary paint costs Tori $4. To make a profit, she increases the price of the frames by 40%. How much does she charge for the painted frames?

Answers

Answer:$5.60

Step-by-step explanation: $4*0.4= 1.6

1.6+4=5.60

Multiply $4 by 40% or 0.4 then add it to the $4

Please help! Correct answer gets brainliest!

Answers

Answer:

7

Step-by-step explanation:

Answer

61/4 or 6.25

Step-by-step explanation:

I belivie this is correct

I would love help thanks!

Answers

B. 5 is your answer

13 out of 27 sixth-grade students said they prefer Powerade to Gatorade. What percent voted for Powerade? What percent voted for Gatorade?

Answers

Powerade : 48.1481 %
Gatorade : 51.8519 %

This composite figure is made up of three simpler shapes. What is the area of this figure?

Answers

Im pretty sure the answer is 116 square cm

Answer: it’s 116

Step-by-step explanation:

Two transformations are performed on a figure on a coordinate plane. The first transformation is translated 6 units up and 3 units right. Which second transformation will result in an image that is similar to, but not congruent to, the original figure?

Answers

Answer:

The last answer choice

Step-by-step explanation:

This transformation doesn't not keep its congruent

3nd answer is the right answer for that question.

y-12=4y solve for y and show work plz

Answers

First, you want to start by subtracting y from each side to get it isolated. After that, your equation should be
3y= -12
Then, divide each side by 3 to isolate the y. You should end up with y= -4
-4 is the answer love
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