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3 years ago

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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PLEASE ANSWER FAST IM FAILING MATH!!!

posledela

Answer:

Step-by-step explanation:

From the figure attached,

Point B has been dilated to form point B'.

B(3, 1) → B'(6, 2)

→ B'[(2 × 3), (2 × 1)]

Since rule for the dilation of a point (x, y) by a factor of k is,

B(x, y) → B'(kx, ky)

By comparing the coordinates k = 2 is the scale factor by which the point B has been dilated about the origin.

Therefore, other vertices of the quadrilateral will be,

A(-2, 3) → A'(-4, 6)

C(1, -1) → C'(2, -2)

D(-3, -2) → D'(-6, -4)

4 0

3 years ago

URGENT HELP NEED!!! I WILL REWARD LOTS OF POINTS FOR THIS QUESTION!!! ANY IRRALEVENT OR SILLY QUESTION WILL BE INSTANTLY REPORTE

Ipatiy [6.2K]

Let the points be A,B,C

A(0,0)
B(24,16)
C(8,20)

$\\ \bull\sf\leadsto AB=\sqrt{(24-0)^2+(16-0)^2}=\sqrt{24^2-16^2}=\sqrt{576-256}=\sqrt{320}=17.4units$ (leg3)

$\\ \bull\sf\leadsto AC=\sqrt{(8-0)^2+(20-0)^2}=\sqrt{8^2+20^2}=\sqrt{64+400}=\sqrt{464}=21.4units$ (leg1)

$\\ \bull\sf\leadsto BC=\sqrt{(24-8)^2+(26-20)^2}=\sqrt{16^2+(-4)^2}=\sqrt{256+16}=\sqrt{272}=16.4units$ (leg2)

We have to find perimeter

$\\ \bull\sf\leadsto Perimeter=AB+AC+BC$

$\\ \bull\sf\leadsto Periemter=17.4+16.4+21.4$

$\\ \bull\sf\leadsto Perimeter=55.2units$

The length of leg3=17.4units

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3 years ago

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Bella saw that 7 out of 11 people brought an umbrella to the beach. There were 99 people there. How many of them did NOT have a

Leokris [45]

That means that 4 out of 11 people did not have umbrellas
You can write this as a fraction so
4/11 = x/99
Then, multiply both sides by 99 to isolate the variable.
So x is going to equal 99 times 4 divided by 11, which is 36. That means 36 people did not have umbrellas.

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3 years ago

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What is the average of 143, 98, and 128

asambeis [7]

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