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3 years ago

6

A box filled with books weighs 11 1/2 kilograms. Assume 1 kilogram = 2.20 pounds. What is the best estimate of the weight of the

box in pounds? O 20 pounds O 25 pounds O 30 pounds O I don't know

1 answer:

Bad White [126]3 years ago

5 0

Answer:

25 pounds.

Step-by-step explanation:

1 kg = 2.2 pounds

11.5 kg = x pounds Cross Multiply

1 * x = 11.5 * 2.2

Since you are estimating the question, you don't use a calculator. So 11.5 * 2

23 pounds. 11.5 * 0.2 = 2.3 pounds

Total = 23 + 2.3 = 25.3

So the total is more than 25 but way less than 30

You can make the question a bit more formal by noticing what I did was related to the distributive property.

11.5 ( 2 + 0.2) Remove the brackets.

11.5 * 2 + 0.2*11.5 Which gives you exactly the same thing as above.

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3 years ago

Answer this question to get 20 points!!!!

Ludmilka [50]

Answer:

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Step-by-step explanation:

First, we need to find the LCD (Least common denominator)

Rewriting input as fractions if necessary:

1/10, 1/4, 1/5

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Therefore, the least common denominator (LCD) is 20.

Now, we convert:

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3 years ago

Which real-world story is represented by the addition problem (–2) + (–3) = –5?

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The answer is A.

If the submarine descended then it went below, and if it ascended it went above. Therefore:

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"Then descended another 3 miles"= -3

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6 0

3 years ago

Omar is making a scale model of the statue of liberty for a report on New York city. the statue of liberty is 305 feet tall meas

Alenkasestr [34]

For this case we have that the real height of the statue is given by:

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The relationship between the model and the real statue is:

$y = kx$

Where,

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Substituting values we have:

$y = (\frac{1}{100}) * (305)\\y = 3.05$

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3 0

3 years ago

Read 2 more answers

Plot c so its distance from the origin is 1. Plot poin e 4/5 closer to the origin than c. What is its cooridinate?

Mashutka [201]

Answer:

$C = (1,0)$

$E = (0.8,0)$

See attachment for C and E

Step-by-step explanation:

Given

$O= (0,0)$ --- Origin

$CO = 1$ --- distance of C to O

Solving (a): Plot point C

Calculate the coordinates of C using distance formula:

$d = \sqrt{(x_2 - x_1)^2 + (y_2 -y_1)^2}$

Where:

$O= (0,0)$ --- $(x_1,y_1)$

$C = (x,y)$ -- $(x_2,y_2)$

$d = CO = 1$

So, we have:

$1 = \sqrt{(x - 0)^2 + (y -0)^2}$

$1 = \sqrt{x^2 + y^2}$

Square both sides

$1^2 = x^2 + y^2$

$x^2 + y^2 =1$

For this solution, we assume y = 0

$x^2 + 0^2 =1$

$x^2=1$

Solve for x

$x = 1$

So, the coordinates of C is: (1,0)

$C = (1,0)$

Solving (b): Plot point E

We have that E is 4/5 closer to the origin.

This implies that, the ratio is:

$m : n = 4/5:1/5$

Multiply by 5

$m : n = 4:1$

<em>So, E is at 4:1 between O and C</em>

Calculate the coordinates of E using:

$E = (\frac{mx_2 + nx_1}{m + n},\frac{my_2 + ny_1}{m + n})$

Where

$O= (0,0)$ --- $(x_1,y_1)$

$C = (1,0)$ --- $(x_2,y_2)$

$m : n = 4:1$

$E = (\frac{4*1 + 1 * 0}{4 + 1},\frac{4*0 + 1*0}{4 + 1})$

$E = (\frac{4}{5},\frac{0}{5})$

$E = (0.8,0)$

6 0

3 years ago