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Temka [501]
3 years ago
7

A square has an area of 81 inches.if the side lengths of the square are each mutlipied by 2,find the area of the new square​

Mathematics
1 answer:
diamong [38]3 years ago
8 0

Answer:

The area of the new square=324 in²

Step-by-step explanation:

The area of a square can be expressed as;

A=L×L

where;

A=area of the square

And since the sides of a square are equal, they can be expressed as;

L=length of one side

L=length of the other side

In our case;

L=unknown

A=81 in²

replacing;

81=L²

√L²=√81

L=9

Multiply side length by 2

9×2=18 inches

The new area can be expressed as;

A=18²=324 in²

The area of the new square=324 in²

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Nostrana [21]
F=\dfrac{9}{5}C+32\\\\a.\ \dfrac{9}{5}C+32=F\ \ \ \ |-32\\\\\dfrac{9}{5}C=F-32\ \ \ |\cdot\dfrac{5}{9}\\\\C=\dfrac{5}{9}(F-32)


F=60\to C=\dfrac{5}{9}(60-31)=\dfrac{5}{9}\cdot29\approx16.1\\\\\boxed{60^oF\approx16.1^oC}


C=42\to F=\dfrac{9}{5}\cdot42+32=75.6+32=107.6\\\\\boxed{42^oC=107.6^oF}
8 0
3 years ago
Line m is parallel to line n. Name a pair of corresponding angles. A. 2 and 5 B. 3 and 6 C. 1 and 7 D. 3 and 7
Sauron [17]

Answer:

C. 1 and 7

Step-by-step explanation:

7 0
3 years ago
An object sitting on a high shelf has no energy.
mel-nik [20]

Answer:

false

Step-by-step explanation:

objects always have energy no matter the location

6 0
4 years ago
Elizabeth bought $5.00 worth of candy at the convenience store. She bought ten more 6-cent salt-water taffies than 10-cent taffi
svp [43]

Answer: 20 6-cents, 30 8-cents, 10 10-cents and 2 20- cents

Step-by-step explanation:

6 cent = x+10

10 cent= x

8 cent= 3x

20 cent=2

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400 divided by 40=X

x=10.

10+10=20/ 6 cents

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20 cents= 2.

6 0
4 years ago
Estimated the difference 825 round subtract the rounded numbers 213 rounds to
boyakko [2]

Answer:

600

Step-by-step explanation:

Given,

Numbers are 825 and 213.

If the number are equal  or greater than 50 then one number will be rounded up. if the number is less then it will rounded down.

Like in this case 25 and 13 are less than 50 so, they will not rounded up.

825 will be rounded to 800.

213 will be rounded to 200.

Subtraction of number

= 800 - 200 = 600

7 0
3 years ago
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