Finding a Mistake in a Subtraction Problem
Jordan wants to solve the problem: 453-254 = ?
He begins by making an estimate.
450-250 = 200
Estimate:.
Then he uses expand-and-trade subtraction to find an exact answer, but his answer is not
close to his estimate. This is his work.

"Oops," says Jordan, "I didn't cross out 400 and write 300."
Explain why not changing 400 to 30 is a mistake.
Hint: Use what you know about place value in your answer.)

Answer:

1 line of symmetry

Step-by-step explanation:

picture has only vertical symmetry

Answer

using y = mx+c

where m is the slope and c

6 = 3(2)+c

6 = 6 + c

c= 0

Y-intercept is where the line passes through the y-axis, which is where x = 0

So, when x = 0, y = 0

Another point on the line, then, is {0,0}

Answer:

hde

Step-by-step explanation:

they both add up to 180 since they're both on line BI

Answer:

<EDH

Step-by-step explanation:

When two angles are supplementary they sum to 180. This means together they form a straight line. So, to find the answer find the angle that connects to <HDI to create one straight line. In this case, that is <EDH because line EI is straight and the two aforementioned angles are the ones that create the line.

Answer:

264cm^3

Step-by-step explanation:

8 × 5 × 5 = 200

8 × 1 × 8 = 64

200 + 64 = 264

Answer:

i hope it helps

mapriend

Answer:

Step-by-step explanation:

divide 90 by 2, 3, 7

small bags 90 ÷ 2 = 45

medium bag 90 ÷ 3 = 30

large bag 90 ÷ 7 = 12.8 round it to nearet whole number = 13

Answer:

Dakota has 94 books, while Darius has 144.

Step-by-step explanation:

Given that Darius and Dakota are roommates, and together they have 238 books, if Darius has 50 more books than Dakota, to determine how many books does Dakota have the following calculation must be performed:

Dakota = X

Darius = X + 50

X + X + 50 = 238

2X + 50 = 238

2X = 238 - 50

X = 188/2

X = 94

Therefore, Dakota has 94 books, while Darius has 144.

If we compare the given values then we can find that database B is more likely to have a smaller standard deviation.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers.

While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.

Given that the values in database A are 0 from 100 and have a mean of 50 and Database B has entries from 49 to 51 and also has a mean of 50.

We are required to find the database whose standard deviation is lower.

Standard deviation measures the variation of values. It is calculated after finding the mean. The square of a standard deviation is known as a variance.

Database A has values from 0 to 100 and has a mean of 50. Because the values are somewhat very larger than 50 and database B has values from 49 to 51, there are more chances that the standard deviation of database B will have a smaller value than the standard deviation of database A.

Hence if we compare the given values then we can find that database B is more likely to have a smaller standard deviation.

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Answer:

9.85

Step-by-step explanation:

With all the data we get:

0.4+1+0.6+0.85+0.85+0.95+2+1.05+1.05+1.1

Add them all up and you get:

9.85

I did not do this on paper, but on a calculator, to make sure my answers were correct.

happy learning!

--Applepi101

Answer:

9.85 inches

Step-by-step explanation:

Total amount rain that fell in desert :

Amount of rain in inches * number of times recorded in the year

Amount of rain is on the horizontal axis

Number of times is given by the number of dots on each Rainfall amount.

Therefore ;

(1*0.4) + (2*0.5) + (1*0.6) + (2*0.85) + (1*0.95) + (2*1) + (2*1.05) + (1*1.1)

= 9.85 inches

Answer:

A) 12 / 13

Step-by-step explanation:

The Sine of a number is defined as the ratio of the length of the side opposite the angle, divided by the length of the hypotensue.

Answer:

Each decade it grows by 10% because a whole decade is 10 years

Answer:

19 meters

Step-by-step explanation:

1. 35×2= 70

2. 108-70=38

3. 38÷2=19

I hope that helped☺

Answer:

1/6 bcause

Step-by-step explanation:

it is a 4 by 3 block so if your going to count cont by the side answe is 1/6

Answer:

7k is the answer

Step-by-step explanation:

-k -(-8k)

-k+8k

7k

Answer:

JG = 6.5 & JH = [tex]6.5 *\sqrt{2}[/tex] or 9.192388155

Step-by-step explanation:

45-45-90 triangles follow a pattern in which the smallest sides are equal & we represent them by x.

The hypotenuse is equal to [tex]x*\sqrt{2}[/tex]

So that's how we find our answers :0)

Answer:

Step-by-step explanation:

[tex]parent~function~f(x)=\sqrt{x-4} -1\\new ~function ~g(x)=\frac{1}{3} \sqrt{x-4}-1[/tex]

Using translation concepts, an equation that could represent this function is:

[tex]f(x) = \frac{1}{3}(\sqrt{x - 4} - 1)[/tex]

The square root parent function is given by:

[tex]f(x) = \sqrt{x}[/tex]

After the translation:

[tex]f(x) = \sqrt{x + 4} - 1[/tex]

[tex]f(x) = \frac{1}{3}(\sqrt{x - 4} - 1)[/tex]

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Answer:

5 only

Step-by-step explanation:

Answer:

5 only

Step-by-step explanation:

The value of x is 6 or 3.5.

The relationship between the three sides of a right-angled triangle is explained by the Pythagoras theorem, commonly known as the Pythagorean theorem. The Pythagorean theorem states that the square of a triangle's hypotenuse is equal to the sum of its other two sides' squares.

We have,

Radius = (x-2)

CB= 2x -9

Using Pythagoras theorem

AB² + CB² = AC²

(x-2)² + (2x-9)² = (x-2+1)²

x² + 4  -4x + 4x² + 81 - 36x = x² + 1 -2x

4x² -38x + 84 = 0

Solving the quadratic equation we get

x= 6 or 3.5

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Answer:

To find the range of flight times, you need to find the difference between the shortest and longest flight times. The shortest flight time was on Monday at 314 minutes, and the longest flight time was on Friday at 407 minutes. The range is 407 - 314 = 93 minutes. The correct answer is therefore (b) 93 min.

Step-by-step explanation:

Answer:

(2m + 1) * x ^ 2 - (2m + 5) * x + (2m + 1) = 0

2mx^2+x^2-2mx+5x+2m+1=0

3mx^2+5x+1=0

That's as far as you can get simplifying it.

Step-by-step explanation:

Answer:

1 is factors of this question

Answer:

a.option is your answer

Answer:

9,603 ovens

Step-by-step explanation:

Given:

Last year ---> 32,010 ovens

This year ---> 30% of last year

Question:

How many ovens did they sell this year?

Work:

To find out how many ovens they sold this year, all of you have to do is just multiply 30% by 32,010, the amount of ovens they sold last year

32,010 * 0.3 = 9,603

Solution:

Easy Cooking sold 9,603 ovens this year.

Hope this helped! :D

A) This is an independent event.

B) The probability that you would draw 2 reds is 0.017

The likelihood of an event occurring is known as probability. You can determine how likely something is by asking someone what the probability of something happening is.

When people purchase lottery tickets, the likelihood of winning is typically stated, and it occasionally may be as low as 1/10,000,000. (or even worse). This informs you that there is a low likelihood that you will succeed.

There are 4 reds out 0f 30 colours

The probability of drawing red the first time is 4/30 = 2/15

The probability of drawing red on the 2nd time is 4/30 = 2/15

The probability of drawing red on the both draw is = 2/15 × 2/15

                                                                                     = 4/225

                                                                                     = 0.0170

Thus, The probability of drawing red on the both draw is 0.0170.

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Answer: E and B are the right answer I think tell me if im wrong :)

Answer:

The correct answer is (0.8, 0.9)

(0.8+0.9) divide by 2 = 85

:) hope this helps

Step-by-step explanation:

The total length is 2.077m (2177 cm).

Length is a measurement of size, distance, or duration. It can refer to physical size (length of a field, length of an object, etc.), distance (length of a journey, length of a river, etc.), or duration (length of a movie, length of a school day, etc.). Length can also refer to the duration of time it takes to complete something (length of a task, length of a process, etc.). Length is typically measured in units such as meters, feet, inches, miles, kilometers, and seconds.

The given measurements can be added together to calculate a total length. The addition of 1.8m, 77cm, and 210mm can be expressed in the form of a sum equation. The equation would be 1.8m + 77cm + 210mm = ?.

To solve this equation, the measurements need to be converted to the same unit of measurement. In this case, all measurements can be converted to cm. 1.8m is equal to 1800cm, 77cm is equal to 77cm, and 210mm is equal to 21cm.

Therefore, the sum equation becomes 1800cm + 77cm + 21cm = ?. To find the total length, the numbers can be added together.

The total length is 1977cm. However, since the measurements are expressed in decimals, the answer must also be expressed in decimals. Therefore, the total length is 2.077m (2177 cm).

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Answer:

d. [tex]90^{\circ}[/tex]

Step-by-step explanation:

This is the definition of perpendicularity.