Solve a magic square of 3 by 3 squares
numbers are- 20  21  22  23  24  25  26  27  28

Answer:

           6.0 cm²

Step-by-step explanation:

Area of the coin:

So area of the ring:

A = 8.8 - 2.0 = 6.0 cm²

Answer:

4.15

Step-by-step explanation:

d = 2.8cm,  a = 1.4cm

a = πr2

a = 3.14 * 1.42

a = 3.14 * 1.96

a = 6.15cm2

6.15 - 2 = 4.15

The area of the nickel ring is 6.15cm2

Answer:

nr. 1 and 3 is a Dilation 2 and 4 are not Dilations

Step-by-step explanation:

Dilation is an elnargment or shink of a figure by a x(factor) that makes the SAME image but smaller or larger

Answer:

Option d is correct.

Vertical angles are congruent;

SAS

Step-by-step explanation:

Given: ,

In ΔNKJ and  ΔMLK

and      [Side]                 {Given}

Vertical angles states that the two lines intersect to make an X, angles on opposite sides of the X are called vertical angles.

i.e and are vertical angles.

Also, vertical angles are congruent.

 [Angle]      [Vertical angles are congruent]

SAS(Side-Angle-Side) postulate states that if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent.

then, by SAS postulates;

         Hence proved!

Therefore:

Statement                                                                      Reason

1.  ,           Given

2.                   Vertical angles are congruent

3.             SAS

Hi

2x-y=5

3x+2y=4

We need to solve 2x-y=5 for y

Now let's start by adding -2x to both sides

2x-y-2x=5-2x

-y=-2x+5

Divide both sides by -1 so we eliminate the negative sign

-y/-1=-2x+5/-1

y=2x-5

Now substitute 2x-5 for y in 3x+2y=4

3x+2y=4

3x+2(2x-5)=4

3x+4x-10=4

7x-10=4

Add 10 to both sides

7x-10+10=4+10

7x=14

Divide both sides by 7 so we can find the value for x

7x/7=14/7

x=2

Now substitute 2 for x in y=2x-5 so we can find the value for y

y=2x-5

y=(2)(2)-5

y=4-5

y=-1

Answer: (2,-1)

I hope that's help:0