Mathematics Middle School

Describe and correct the error in solving the system of linear equations.
5 + 2y = 9
3x - 2y = -1
2x = 10
x = 5

Answers

Answer 1

Answer:

The second equation is incorrect!

Step-by-step explanation:

Let's break this down line by line:

y=2

x=5

1) 5 + 2y = 9  this equation is basically 5 + (2x2) = 9 meaning that y equals 2. This equation is correct!

2) 3x - 2y = -1 becomes (3x5) - (2x2) = which also basically becomes 15 - 4 which in reality equals 11. This means the equation on the second line is incorrect! Because  3x - 2y = -1 is incorrect and it is actually 3x - 2y = 11

3) 2x = 10 is correct because x=5 meaning that this equation would be       2 x 5 = 10!

Related Questions

50 POINTS!!!!!!!!!
Bethany is making trail mix with 3 cups of raisins for every 2 cups of peanuts. Which table represents this proportional relationship? A 2-column table with 3 rows. Column 1 is labeled Peanuts (x) with entries 3, 12, 16. Column 2 is labeled Raisins (y) with entries 2, 8, 12. A 2-column table with 3 rows. Column 1 is labeled Peanuts (x) with entries 2, 3, 6. Column 2 is labeled Raisins (y) with entries 8, 12, 24. A 2-column table with 3 rows. Column 1 is labeled Peanuts (x) with entries 3, 8, 12. Column 2 is labeled Raisins (y) with entries 2, 16, 24. A 2-column table with 3 rows. Column 1 is labeled Peanuts (x) with entries 2, 8, 12. Column 2 is labeled Raisins (y) with entries 3, 12, 18.

Answers

Answer:

x=raisin

y=peanuts

Step-by-step explanation:

x 3 6 9 12 18

y 2 4 6 8 10

Answer:

D

Step-by-step explanation:

What are the 100 digits of pi?

Answers

Answer:

why 100 when you can have 1000

3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 8214808651 3282306647 0938446095 5058223172 5359408128 4811174502 8410270193 8521105559 6446229489 5493038196 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482 1339360726 0249141273 7245870066 0631558817 4881520920 9628292540 9171536436 7892590360 0113305305 4882046652 1384146951 9415116094 3305727036 5759591953 0921861173 8193261179 3105118548 0744623799 6274956735 1885752724 8912279381 8301194912 9833673362 4406566430 8602139494 6395224737 1907021798 6094370277 0539217176 2931767523 8467481846 7669405132 0005681271 4526356082 7785771342 7577896091 7363717872 1468440901 2249534301 4654958537 1050792279 6892589235 4201995611 2129021960 8640344181 5981362977 4771309960 5187072113 4999999837 2978049951 0597317328 1609631859 5024459455 3469083026 4252230825 3344685035 2619311881 7101000313 7838752886 5875332083 8142061717 7669147303 5982534904 2875546873 1159562863 8823537875 9375195778 1857780532 1712268066 1300192787 6611195909 2164201989

Answer:

3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679

Step-by-step explanation:

I will give brainliest to whoever helps me with this question. Also, if you could please explain to me how you solved it I would appreciate it!

Answers

How can you find width if This is 2d

6th grade math i dont understand!!!!!!

The histogram shows the number of points scored by a basketball team for one season.

Histogram named as ALTDCPoints Scored in One SeasonALTDC. 3 games scored between 69 to 76, 6 games scored between 77 to 84, games scored between 85 to 92 and 1 game scored between 93 to 100.

According to the histogram, in what percentage of games did the team score between 77 and 92 points?
Round your answer to the nearest percent.

Answers

umm im older and I dont even understand that

The percentage of games did the team score between 77 and 92 points is 78%.

What is Percentage?

To determine the quantity or percentage of something in terms of 100, use the percentage formula. Per cent simply means one in a hundred. Using the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a fraction of 100 is what it is. It is mostly used to compare and determine ratios and is represented by the symbol %.

We have,

Total games = 3 + 6 + 8 + 1 =18

and, number of games in which points between 77 and 92.

= 6 + 8

= 14

Now, the percentage of games did the team score between 77 and 92 points

= 14/18 x 100

= 77.777%

= 78%

Learn more about Percentage here:

https://brainly.com/question/29306119

#SPJ2

A mover is loading an elevator with many identical 48-pound boxes.
The mover weighs 185 pounds. The elevator can carry at most 2000 pounds.
Write an inequality that says that the mover will not overload the elevator on a particular ride.

a. Solve your inequality and explain what the solution means.

b. Graph the solution to your inequality on a number line.

Answers

Answer:

b

Step-by-step explanation:

a) After solving inequality , we get x ≤ 37.81 which meant number of boxes must be less than or equal to 38 approximately.

b) The graph is attached below.

What are inequalities ?

When two values are compared , an inequality represents whether one is greater than, less than, or not equal to the other.

It is given that the elevator can carry at most 2000 pounds of load. The weight of mover is 185 pounds. Also a mover is loading an elevator with many identical 48-pound boxes.

a)

Let's assume that the number of boxes is x.

Then the inequality can be written as :

48 × x + 185 ≤ 2000

Solving the inequality to get the value of x :

48x ≤ 2000 - 185

48x ≤ 1815

x ≤ 38 (approximate)

It meant

b) The graph for inequality which is 48 × x + 185 ≤ 2000 or say x ≤ 38 is shown below.

Therefore , the answers are :

a) After solving inequality we get x ≤ 37.81 which meant number of boxes must be less than or equal to 38 approximately.

b) The graph is attached below.

Learn more about inequalities here :

brainly.com/question/25275758

#SPJ2

EASY 13 POINTS RIGHT HERE

10.31 as a mixed number

Answers

Answer:

Step-by-step explanation:

Pls, HELP IF U DONT KNOW THE ANSWER THEN DONT RESPOND, I WILL GIVE BRAINLESS IF CORRECT.

Answers

Answer:

The answer is 0.23

Step-by-step explanation:

Hope this helps.

Pls tell me if Im not correct.

Answer:

Area of Shaded Region ≈ 0.23 cm^2

Step-by-step explanation:

Simple Question.

The diameter of the circle is 0.4 m, so the radius = 0.4/2 = 0.2 m.

The area of the circle = πr^2 = π(0.2)^2 = 0.04π

The area of the rectangle = 0.9*0.4 = 0.36

The area of the shaded region = 0.36 - 0.04π (π => 3.14) = 0.36 - 0.1256 = 0.2344 ≈ 0.23 cm^2

Angle 3 is 65 degrees. Identify all the other angles that measure 65 degrees

Answers

Answer:

angle 2 angle 7 and angle 6 measures 65° also

angle 2,6,7 are also 65 degrees

pls help!!! ill give a brainliest

Answers

Answer:

--6+36m

Step-by-step explanation:

Step-by-step explanation:

the answer is 36m-6 .the process is shown in the picture

Write the equations of the graphs below. I will give 5 points if correct​

Answers

Answer:

b or g

Step-by-step explanation:

because u shade it and read it

A. 4x - 1 = y
B. -2/3x + 2 = y
C. y = -1
D. x + 2 = y
E. -4x - 3 = y
F. I cant tell what it is
G. x + 5 = y
H. x = 2

correct=brainliest
thanks and rate 5 stars

Answers

Answer: 1 is -16 and the second one is 125

Step-by-step explanation:

I said that because what you earned is what they give but when you spent you lose money.

-16 and 125 is the answers in order

Only number 6. ‍ ‍ ‍ ‍ ‍ ‍ ‍

Answers

the answer is 6, 4 divided by 2/3 =6
if you need to show your work just multiply by the reciprocal :)

Pls help due today plsss

Answers

Answer:

25

Step-by-step explanation:

the answer should be 25.

3 The formula to find the area of a rectangle is A = lw. If l = 6 in and w = 5 in, then what is the area of the blue portion of the rectangle? A. 11 sq in B. 22 sq in C. 15 sq in D. 30 sq in

Answers

Answer:C. 15

Step-by-step explanation:

Its 15 because the rectangle is 30 and the blue side is half of it so you would have to divide 30 by 2

30 ÷ 2 = 15

3x(x−2), when x=7

I am giving out the crown to people who gets the answer right :) !!!!!!!!!!!

Answers

Answer:

105

Step-by-step explanation:

subbing x for 7:

3*7(7-2)=21*5=105

105 right? because 3(7)((7)-2) 21(5) =105

UHHHHHHHHHHHH THIS IS EASY MATH WORK BUT I ONLY HAVE 2 BRAINCELLS THAT ARE SLOW SO JSJSJJSJJSJ HELP.

Answers

Answer:

1,708

My browser has a tool for solving the area of trapezoids that I used. Hope this helps!

1708 is than answer

Pls help it is due today

Answers

Answer:

D, (45,22)

Step-by-step explanation:

Just read the graph, the point next to x 50 on the left is those coordiantes

Agreed with the person above me

Which number is in the solution set of the inequality x < 15?
A)
12
B)
18
C)
21
D)
24

Answers

Answer:

A) 12

Step-by-step explanation:

As 12 is less then 15..Simple:)

What signs and symbols can be used to show multiplication?

Answers

Answer:

(x) and (•), (*)

Step-by-step explanation:

uwusisisjjskssj

Answer:

what the hell it didnt let me answer

Step-by-step explanation:

The student government wants to determine the theme for the eighth-grade dance. Which group would it be best to take a sample from?
student government
eighth-grade students
eighth-grade students in student government
middle school students

Answers

Eighth grade students because you want to give them the opinion and decide what THEY want

Pls help it is due today

Answers

Answer:

576

Step-by-step explanation:

4 feet^2 = 2 feet*2 feet = 24 inch * 24 inch. 24*24 = 576.

the answer is 567 because u have to know that a rectangle is to long to short

Does anyone know this?

Answers

Answer:

1 circifurence 6 18.850 area in squre 28.270

2 Circumference 37.70  Area in Square Inches 144.000

3 circumference 6.283          area in square inches   3.142

4 circumference   21.990                  area in squre inches 38.480

Is the area of the shaded rectangle 6(2−m) or 6(m−2)?
Explain how you know.

Answers

Answer:

6(2-m)

Step-by-step explanation:

the m could not be times only two so the answer would have been 12-m no matter what you don't add or subtract or times the letter because unless if the number had the same letter!

Hope this helps!! if it doesnt i apalogize!! god bless!! - Natalia

Answer:

6(m-2) because you start from 6--->  then M--->  then 2

Step-by-step explanation:

If this doesn't help here is a step by step

Find the area of the shaded region: How to find the area of shaded region of a rectangle within another rectangle? Step 1: Find the area of the larger shape and the smaller shape. Step 2: Subtract the areas. Step 3: Write the units. How to find the area of a shaded region of a circle with an inscribed triangle?

can u help me plssssssssssss

Answers

Regroup terms:
y - 2/9 ≤ 5/9

Add 2/9 to both sides:
y ≤ 5/9 + 2/9

Simplify 5/9 + 2/9 to 7/9:
y ≤ 7/9

y - 2/9 ≤ 5/9

y ≤ 5/9 + 2/9

y ≤ 7/9

Step-by-step explanation:

Help me please. ASAP

Answers

Answer:

A) Neither is a solution

I really need help. please asap and i will mark brainly if correct.

Answers

It’s false because when you put it in slope intercept form 2x+ 3y= 3 turns into 3y=-2x+0 which then turns into y=-2x+1
And 2x-3y= 0 turns into -3y= -2x+0 which then turns into y=-2x+0
Which makes this false
the answer is false!!

Rose’s grandmother is 89 years old. She can knit mittens somewhere between 13 and 16 hours. If she wants to knit 36 mittens for the students at her church, about how long would it take her? for 15 points

Answers

if it takes that long to make one pair, then i’d say maybe 468 hours to make all 36 pairs
Answer : around 487
( not 100%)


Explanation :
16times 36

Which is equal 576
And the grandmother is 89 so u subtract it and got 487

Use the original price and the markdown to find the retail price.

Original price: $80; Markdown: 20%

Answers

Answer:

$64

Step-by-step explanation:

20% of 80 = 16

$80 - $16 = $64

Answer:

$64

Step-by-step explanation:

1. Approach

Multiply the original price by the markdown, then subtract the result from the original price.

2.Find the amount by which the item was marked down

Multiply the original price by the percent by which it was marked down.

Original price * markdown

80 * 20%

*don't forget to convert the percent to a decimal by dividing the percent by 100

80 * 0.2

= 16

3. Find the new price

Subtract the amount by which the product was marked down from the original price;

original_price - markdown

80 - 16

= 64

I'm really bad at math so ill be posting questions a lot-

Answers

Answer is 6/5. You keep 2/5, change into x, and flip 3/1

Calculate the average velocity of a dancer who moves 5 m toward the left of the stage over the course of 15 s.

Answers

Answer:

Divide the distance by the time and get average velocity in units of m/s.  The direction is to the left.

It should be 0.33 m/s
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