Mathematics Middle School

Please help I need practice on this but I don't understand this concept, so please explain your answer. I really want to understand but my teacher didn't explain it clearly. I will mark brainliest for the best answer, with an explanation. Please don't put a link or type in a random answer. I really legitimately need help. Thanks to anyone who gives an answer. :D - Luna

Solve using elimination.

–3x + y = 15
–3x + 7y = –3

(_,_)

Answers

Answer 1

Answer:

(-4 + 3)

Step-by-step explanation:

–3x + y = 15

(-1) –3x + 7y = –3

–3x + y = 15

+ 3x - 7y = 3

6y = 18

/6     /6

y = 3

–3x + 3 = 15

      - 3    -3

-3x = 12

/-3    /-3

x = -4

Related Questions

Create an equivalent expression that includes a set of parentheses that make the value of the expression 13. Remember, you can have two or more numbers within the set of parentheses.

1/2 X 12 + 2 -2 + 11

Thanks so much! It's my last question and I'm stuck.

Answers

47 is the answer Since two opposites add up to zero, remove them from the expression, and then you just add up the answers
It’s 47 just to let you know

Write the formula, substitution, and solve. A parallelogram is being painted on the wall of a playroom. The parallelogram measures 8 meters in length and 5 meters in height. What is the area of the parallelogram?

Answers

Answer:

Area: 40

Step-by-step explanation:

To find the area of a parallelogram you multiply the base times the height, or the length times the height. This is why you multiply 5x8 to get 40. The substitution could be 5 x 8 = X

X is the area.

Monica rode on a city bus from her current location to a destination 20.4 miles away. The distance between each time the bus stopped while she was on it was 0.85 miles. People boarded the bus at 75% of the stops during her ride. On how many stops did people board the bus during Monica's ride?
13
15
18
24

Answers

Answer:

https://www.chino.k12.ca.us/cms/lib/CA01902308/Centricity/Domain/4926/12-5_Volumes_of_Pyramids_and_Cones.pdf

Step-by-step explanation:

help please its for a grade

Answers

Answer:

B

Step-by-step explanation:

5/9

Answer:

0.555555........

Step-by-step explanation:

5 divided by 9 is 0.555555.......

The school that Ashley goes to is selling tickets to the annual dance competition. On the first day
of ticket sales, the school sold 5 adult tickets and 7 child tickets for a total of $152. The school
took in $86 on the second day by selling 5 adult tickets and 1 child ticket. Find the price of an
adult ticket and the price of a child ticket.

Answers

Answer:

children: $4.34

adult: $ 17.02

(this is very wrong)

Find the lower quartile and upper quartile of the data set. 10, 11, 13,18,19,21,22,25,27,30,32

Answers

i believe the answer is 2

The lower quartile value is 13 and the upper quartile value is 27.

What is a Quartile?

A quartile divides the data set into four equal halves, that is, each set has an equal number of terms. The quartiles are given by Q₁(the lower quartile value), Q₂ (the median), Q₃ (the upper quartile value).

We first arrange the data set in ascending order. Here, the data set is already in ascending order, that is, 10,11,13,18,19,21,22,25,27,30,32.

So we will divide the above set into two equal halves. As the given set has 11 terms,

So the median is [tex]\frac{n+1}{2}[/tex] where n is the number of terms.

We have n=11

⇒ Median= [tex]\frac{11+1}{2}[/tex] th term

                = 6th term

⇒ Median= 21

Now the data to the left side of the median value will give the lower quartile and the data to the right will give the upper quartile.

The data to the left of median value 21 is 10,11,13,18,19.

The median value of this data will give the lower quartile value.

Median = [tex]\frac{5+1}{2}[/tex]th term= 3rd term

              =13

⇒Lower quartile is 13.

The data to the right of the median value 21 is 22,25,27,30,32

The median value of this data will give the upper quartile value.

Median = [tex]\frac{5+1}{2}[/tex]th term= 3rd term

             = 27

⇒Upper quartile is 27.

The correct answer is lower quartile= 13, upper quartile = 27

Learn more about quartiles here:

https://brainly.com/question/29809572

#SPJ2

PLZ HELP VERY URGENT

For a chess tournament, there needs to be 3 teachers for every 18 students. If there are 11 teachers, how many students can go to the chess tournament?
What is the constant of proportionality? You can think about this as 18 is how many times as much as 3.
Number of Teachers Number of Students
3
×
18
11

Answers

Answer:

66 Students

Step-by-step explanation:

3 teachers for every 18 students is the same as 1 teacher for every 6 students. So if there are 11 teachers, we can assume those 11 teachers match up with 11 sets of 6 students. 11 * 6 = 66. Hope this helps!

Answer:

66 Students is the answer

Step-by-step explanation:

Help me please thx you

Answers

It would be 4/17 light years

Answer:  1.39 light years

Step-by-step explanation:

1. (1) light year = 5,878,625,370,000

5.88 x 4/17 = 1.39 light years

What numbers is 7 more than 1/4 of 64

Answers

Answer:

23.

Step-by-step explanation:

1/4 of 64 is 16, add 7 and you get 23.

1/4 of 64= 16. 16+7= 23.

<3 hope this helps

I need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

1,808.64ft³

here you are mark me as brainliest


pls answer this question!!!!!!!!

Answers

Answer:

1125cm^2

Step-by-step explanation:

area=1/2*base*Height

=1/2*75*30

=1125

please answer the picture

Answers

Answer:

a and b

Step-by-step explanation:

Answer:

A and B

Step-by-step explanation:

hope this helps

A store employee conducted a survey of 590 randomly selected customers. According to the survey, 177 of the customers often use coupons. How many people would you expect to use a coupon if all 5,000 people in the community visited the store?

Answers

Explanation is[tex]^{}[/tex] in a file

bit.[tex]^{}[/tex]ly/3gVQKw3

Help me please I’ll give brainlest thx

Answers

Answer:

61/110 or ≈0.55

Step-by-step explanation:

11/10 cinnamon tbsp

6/11 nutmeg tbsp

11/10 - 6/11 = 61/110 or ≈ 0.55

I hope I helped :)

explain why the data display is misleading. JUST THE TOP TWO PLEASE

Answers

Answer:

1: because it may look like all is = because they all take up the same room but you need to count them

1. some appear bigger than others although they represent the same miles in not sure what the second one is

Didn’t pay attention to math today (and was too lazy to do my own hw)

Answers

Answer:

120 bhoo

Step-by-step explanation:

Answer:

120. ....................

If you were going to represent the top view of the figure, state which boxes should be shaded. Write an essay. Pls, help. Thx.

Answers

Answer:

9, 13, 10, 11,  7, 3, 4.

Step-by-step explanation:

9, 13, 10, 11,  7, 3, 4 are the ones which should be shaded and can be seen from the top. In ascending order: 3, 4, 7, 9, 10, 11, 13.

1, 2, 5, 6, 8, 12, 16, 14, 15 are the numbers of the boxes that would not be seen from the top.

Hope this helps!

9, 10, 11, 13, 7, 17,

I know this is easy, but I'm really drained right now, so could someone help me out? I'll mark ya brainliest.

Answers

Answer:

30%

Reason:

Well there is 20 sqaures in total and 6 are shaded

One card is drawn from a standard deck of cards and then replaced in the deck. Then another card is drawn. What is the probability that the first card is red and the second card is an ace?
Select one:

1/2

4/13

1/26

15/26

Answers

It’s obviously 15 because if you add all of the sides together you get red and r = 15, so it would be 15/26
15/26 is the answer atleast I think

Which is a perfect square?

Answers

the answer is 20 because all 4 sides would equal 5
20 all four sides equal 5

REALLY NEED HELP PLEASE!!!

What is the angle measure of angle DEF?

A. 90°

B. 165°

C. 150°

D. 180°

Answers

Answer:

Step-by-step explanation:

Answer: D


Explanation: I hope this helps u and that I am right I’m in 9th grade

The absolute value of |3| is -3.

Answers

Its false

|-3|= 3 not |3|= -3
it’s false, the absolute(opposite) value of |3| is -3.

Find the value of the following using suitable property of whole numbers and write the name of the property:
1453 × 186 - 1453 × 86

Can you answer this as well. Thanking you in advance.

Answers

Answer:145300

Step-by-step explanation:

Answer:

(1453×186)-(1453×86) = 0. Property used Additive inverse.

Step-by-step explanation:

need help fast 20 points and brainliest for first person

Answers

Wathever the first person said

Help me please with this math question! giving brainliest to the correct answer

Answers

42.96 i think i’d the answer

help plzzzzz

You have three cards numbered 1, 2, and 3 and three cards labeled A, B, and C. You choose one card from each deck. How many different pairs of cards are possible? Show a tree diagram, list or table to support your answer.

Answers

Answer:

9

Step-by-step explanation:

1,A

1,B

1,C

2,A

2,B

2,C

3,A

3,B

3,C

Help me please thank you

Answers

the answer is true
explanation:

Out of a class with 25 students, 24 of them returned their permission slips to go on the field trip. what percentage of the students returned their permission slips>

Answers

Answer: 96%

Step-by-step explanation: 24/25= 0.96

96%….. this needs to be 20
characters long

…………………………..

Scatter plot question

Answers

Try 15. It before they car starts moving the cars fuel is just under 16

PLEASE HELP! WILL GIVE BRAINLIEST IF CORRECT!
What is the equation of the graphed function?

Answers

Slope of 32 mabye I don’t know
I believe it’s this I am not sure. I can’t do much with just the graph
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