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Vilka [71]
3 years ago
5

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Mathematics
1 answer:
Harrizon [31]3 years ago
7 0

Answer:

9 yd

Step-by-step explanation:

A cube consists of 6 square faces.

Divide the surface area by 6 for the area of one face

486 ÷ 6 = 81 yd²

The area of a square is

A = s² ( s is the side length )

Here A = 81, then

s² = 81 ( take the square root of both sides )

s = \sqrt{81} = 9

Thus side length is 9 yd

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a strip of paper is 9/10 of an inch long. You need to cut the paper into 3/12 inch pieces. How many pieces will you be able to c
jeka57 [31]
First, simplify 3/12 into 1/4 find the least common denominator which is 20
then, 18/20 by 5/20 will equal 13/20.
7 0
3 years ago
Nora ordered a set of purple and green pins. She received 50 pins, and 70% of them were
Paladinen [302]

Answer:

Nora received <u>35</u> purple pins.

Step-by-step explanation:

If Nora received 50 pins, and 70% of the pins were purple, to calculate the number of purple pins Nora received, we must find 70% of 50.

To find 70% of 50, we can multiply 50 by the decimal form of 70%:

50 * .7=35

Therefore, we can conclude that since 70% of the 50 pins Nora received were purple, and 70% of 50 is 35, Nora received 35 purple pins.

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3 years ago
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den301095 [7]

Answer:

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Step-by-step explanation:

4 0
3 years ago
(-2,1) &amp; (1,-1) the equation of the line is
Aleonysh [2.5K]

Answer:

y = (-2/3)x - 1/3

Step-by-step explanation:

Find the equation of the line through the two points (-2, 1) and (1, -1).

As we increase x from -2 to 1 (an increase of 3), y decreases from 1 to -1 (a decrease of 2).

Thus, the slope of this line is m = rise / run = -2/3.

Using the slope-intercept formula y = mx + b, and substituting the givens m = -2/3, x = -2 and y = 1, we get:

1 = (-2/3)(-2) + b, or

1 = 4/3 + b, or 3/3 = 4/3 + b.

Then b must be 3/3 - 4/3, or -1/3, and the equation of the line is then

y = (-2/3)x - 1/3

7 0
3 years ago
I need help please if m&lt;MNR=43 and m&lt;MNP=84 find: m&lt;RNP​ subtract or add
Zielflug [23.3K]

Answer:

  41°

Step-by-step explanation:

The angle addition theorem tells you ...

  m∠MNR + m∠RNP = m∠MNP

Filling in the given values, you have ...

  43° + m∠RNP = 84°

Subtract 43° from both sides of the equation to find the angle of interest:

  m∠RNP = 84° - 43° = 41°

The measure of angle RNP is 41°.

7 0
3 years ago
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