Mathematics Middle School

A student estimated the sum

7.95 + 8.11 + 78.5 + 8.05 + 79.4 + 0.815 as:

All the numbers begin with a 7 or 8, so use cluster estimation.
8 + 8 + 80 + 8 + 80 + 0.8 = 184.8

Explain why this reasoning is not accurate.

Answers

Answer 1

Answer:

The numbers are not clustered around a common number. Two of the numbers are very large and one is very small.

Step-by-step explanation:

hope this helps

Answer 2

The reason is that the round off wasn't done in a correct manner.

What is decimal?

Decimals are the numbers, which consist of two parts namely, a whole number part and a fractional part separated by a decimal point.

Given:

7.95 + 8.11 + 78.5 + 8.05 + 79.4 + 0.815

The round off will be as follows:

8 + 8+ 79 + 8+  79 + 0.9

= 182.9

Hence, the clustered point for three numbers are not correct.

Learn more about this concept here:

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Related Questions

Is 9.1 greater then 9.099? (Im stupid)

Answers

Answer:

yes it is

Step-by-step explanation:

Answer:

no!

9.1 is not greater than 9.099 because we can round 9.099 to the nearest tenths place which brings us to 9.1

High Hopes^^

Barry-

The double number line shows the approximate number of ounces in a certain number of pounds:

Based on the number line, about how many ounces are there in 10 pounds?

PLEASE HELP! I AM GIVING 20 POINTS!

Answers

It would be 160 ounces
It is 176 because I am smart and I always am right I am the biggest brain person ever

does anyone know how to do Linear Equations? can anyone help me under stand them?

Answers

Answer:

yea what is it???

Step-by-step explanation:

Watch it will help you

Jordan is knitting a sweater. He keeps track of how many balls of green and yellow yarn he uses in the table below. If he uses 15 balls of yellow yarn, how many balls of green yarn will he need?

Answers

15 green yarn he needs

need answer ;w; In the equation -8x+ 1/4(20x - 12) = qx - 13x - 3, what value of q makes the equation
have infinitely many solutions?
A
-10
B 0 C 3 D 10

Answers

Answer:

i think it is B

Step-by-step explanation:

If 10x = qx for all values of x, then q must be equal to 10. so, the answer is (D)

What is Equation?

Two or more expressions with an Equal sign is called as Equation.

To have infinitely many solutions, both sides of the equation should be equal regardless of the value of x.

This means that the left side of the equation should simplify to a constant, and the right side of the equation should also simplify to the same constant.

Starting with the left side of the equation:

-8x + 1/4(20x - 12) = qx - 13x - 3

-8x + 5x - 3 = qx - 13x - 3 (distributing 1/4 to (20x - 12))

-3x - 3 = qx - 13x - 3 (combining like terms)

-3x = qx - 13x (subtracting 3 from both sides)

Now, let's simplify the right side of the equation:

-3x = qx - 13x

-3x + 13x = qx (adding 13x to both sides)

10x = qx

Hence, If 10x = qx for all values of x, then q must be equal to 10. so, the answer is (D)

To learn more on Equation:

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Identify the zeros of the function:
f(x) = 4x-8

Answers

Answer:

x=2

Step-by-step explanation:

here is what the line would look like on a graph

I will gove brainliest to whoever gets it right!
Itty Bitty Kitty is walking home.
The distance between her home may be represented by the equation y = -1.5x + 10.5, where x is the time, in hours, that she walks. How many hours did it take Kitty to reach home?

Answers

Answer:

x=3

Step-by-step explanation:

x=7

(not entirely sure if this is correct) :)

i´ve been asking the same question every day and getting lazy wrong answers lmaxo
Explain your answer, please
。 • ﾟ 。 . . . 。 。 . . 。 ඞ 。 . • • ﾟ

Scale Factor of Triangle STU to Triangle PQR
Scale Factor of Triangle PQR to Triangle STU

Scale Factor of Trapezoid EFGH to Trapezoid JKLM =
Scale Factor of Trapezoid JKLM to Trapezoid EFGH

Answers

Answer:

Step-by-step explanation:

Scale Factor of Triangle STU to Triangle PQR  = 15 :  10 = 3 : 2

Scale Factor of Triangle PQR to Triangle STU = 2 : 3

Scale Factor of Trapezoid EFGH to Trapezoid JKLM = 5 : 10 =    1 : 2

Scale Factor of Trapezoid JKLM to Trapezoid EFGH = 2 : 1

help people r really weird

Answers

Sorry they did that. I have no clue what it is tho-

Answer:

B is correct

Step-by-step explanation:

1cm:2.5m

12cm:xm

1/2.5 & 12/x

Katie made a batch of punch using 20 ounces of juice and 24 ounces of soda.


What is the simplest form of the ratio of the ounces of soda to the ounces of juice?


Enter your answer in the boxes. ratio

Answers

Answer:

5 is the correct answer

Step-by-step explanation:

pls help with these two math questions

Answers

Number 18 is D) (3+8m)-7

Number 19 is:

1) z>1

2) z>-1

3) z<1

4) z<-1

I see it’s math but 1-1= 0

This is my last question please help me

Answers

Answer:

8

Step-by-step explanation:

+0008.00

Absolute Value means the opposite of the number, for example; |7| =-7 / |-3| =3

For this. Under thursday it is 8 degrees, and so if you want to do the opposite you should do |8|=-8

-4 - 5v < -29 i would do it but i got 12 assignments to do in an hour I will give brainliest to whoever help with the 3 recent

Answers

Answer:

v>5

On a number line:

it would be An open circle starting at five going to the right.

What is the answer in scientific notation?
(3.3  107) + (7.7  108)
A 8.03  109
B 8.03  108
C 11  108
D 11  109

Answers

1184.7 this should be the answer I think

Consider these statements.

• Every trapezoid is a quadrilateral.
• Polygon W is not a quadrilateral.

Which conclusion can be made using both statements?
A) Polygon W is not a trapezoid.
B) Polygon W is a pentagon.
C) Polygon W is not a parallelogram.
D) Polygon W is a triangle

Answers

I think it’s A, not sure used process of elimination

The conclusion that can be made is  A) Polygon W is not a trapezoid.

What is a polygon ?

A polygon has three or more than three sides to acute angles and their end points are connected to each other.Every two endpoints form an interior angle and sum of all the interior angle is of 360°.

According to the given statement Every trapezoid is a quadrilateral and Polygon W is not a quadrilateral.

Here from the given statement polygon W is not a trapezoid.It can be a pentagon or a triangle but definitely not a trapezoid.

learn more about polygons here :

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Estimate: 11.72 • 3.01

Answers

Answer:

36

Step-by-step explanation:

12*3=36

estimation**

Hope this helps!!!

[tex]\tt Step-by-step~explanation:[/tex]

This sign, • , means to multiply, so we have to multiply 11.72 by 3.01.

[tex]\tt 11.72~*~3.01=35.2772[/tex]

[tex]\large\b{\tt Our~final~answers}[/tex]

[tex]\tt Nearest~1000^{th}:~35.277 \\Nearest~100^{th}:~35.28 \\Nearest~10^{th}:~35.3\\Nearest~whole:~35[/tex]

This is due by 3pm please help!!!!!!!!!!!!

Answers

I think it’s 100 I tried lol

IM BACK PEEPS< ITS BEEN 3 WEEKS, AYEEEEEEE okay guys, first one here gets brainlist and just so i dont get reported heres an extra question you can answer too

(81 - 9) ÷ 9 - ??

Answers

Answer:

8

Step-by-step explanation:

Kelly has a ribbon that was 5 1/3 feet long. Each piece she cut was 1 1/3 feet long. How many pieces of ribbon did she cut. Show work.

Answers

Answer:

4

Step-by-step explanation:

This is correct because to divided you have to keep, change, flip. First you want to change into in improper fraction of 16/3 and 4/3. The you want to keep your first number of 16/3 and change you sign to multiplication then flip you number of 4/3 to 3/4 and this is your formula.

16/3 x3/4= 48/12 which simplified= 4

HOPE THIS HELPS AND HAVE A GREAT DAY!!!!  

4 is the answer to this

Which cream cheese has the lowest price per ounce?


A.$2.89 for 8 oz

B.$2.59 for 6 oz

C.$5.29 for 14 oz

D.$4.29 for 12 oz

Answers

Answer:

its b

Step-by-step explanation:

i did this

Answer:

i think it is B

Step-by-step explanation:

someone plessss help me on this problem.

Answers

Angle 1 33°
Angle 2 90°
Angle 3 57°

PLS HELP THIS IS VERY HARD FOR ME

Answers

Answer:

cone: 3

vanilla: 2

strawberry: 1

cone equals 3
white ice cream equals 2
pink ice cream equals 1

Interest rates have dropped steadily over the last six months. Each month they have decreased by 1/4 point.

A. Write an expression to represent the total change of rates over the last six months.

B. Find the total change. Make sure to express your answer as a mixed number in lowest terms.

Answers

Answer:

A. m - m(1/4_

B. 6 - 6(1/4)

    6 - 1.5

         4.5

Step-by-step explanation:

Can anyone help me with this question? It would help.

Answers

Answer:

It would be C

Step-by-step explanation:

answer:
c. 23 mpg

explanation:

(92/4)

Please help me understand this problem plz

Answers

Answer:

x∠ = 32

Step-by-step explanation:

since this is a right triangle we can tell that one angle is a right angle (that is, a 90-degree angle)

and since the outsider angle is 122 degrees the sum between the inside one and the outside one must be 180 which means it is 180 - 122 = 58

so we know that the right angle is 90 degrees, the other one is 58 and the sum of angles in a triangle is 180, x must equals 32

180 - 90 - 58

The answer is 32 I think

Select the smallest fraction from the following fractions.
2/4
3/6
1/3
7/9

Answers

Answer:

it 1/3

Step-by-step explanation:

2/4 is just 1/2, 3/6 is also 1/2, 7/9 is over 1/2 and 1/3 is the only one less then 1/2 so it's the lowest fraction. This is not the proper way to solve it but it works and it's faster

I think it’s 1/3 yuh

HELP!
Suppose you receive $100 for a high school promotion present, and you deposit it into a paypal account. Then, each week, you take out $5 to use on snacks at the gas station.

Answers

what's the question?

in 20 weeks the money would be gone.

What’s the question ?? But if this helps, in 20 weeks the money would be gone

The GCF of the numerator and denominator in 15/24 is _____.

8
3
2
5

Answers

Answer:

3

Step-by-step explanation:

I hoped this help plz brainiest

It’s three because three is the only number that goes into 15 and 24 evenly

The mass of an adult North Pacific right whale is about 70,000 kg, or 7 x 10^4 kg. The mass of a male African elephant is about 7000 kg, or 7 x 10^3 kg. About how many times more massive is the right whale than the African elephant?
A. 1 x 10^1 times
B. 1.1 times
C. 1 x 10^-1 times
D. 63,000 times

Answers

Answer:

A

I may or may not be wrong please tell me

Step-by-step explanation:

A:7,000 x 10^1 = 70,000

B:7,000 x 1.1 = 7,700

C:7,000 x 10^-1 = 700

D:7,000 x 63,000 = 441,000,000

the correct answer is a because if you break it down then ...ya

Help, ASAP please. Best answer gets Brainliest.

Answers

i think it is equal too

Answer:

<

Step-by-step explanation:

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