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3 years ago

I need help with math please

Mathematics

1 answer:

Sati [7]3 years ago

3 0

Answer:

ayo

Step-by-step explanation:

thats mad sussss

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Which A regular octagon rotates 360° about its center. How many times does the image of the octagon coincide with the preimage d

Tamiku [17]

Answer:

The word you are looking for is rotational symmetry and for that an octagon has orders of 8 (that is what you call the times it overlaps) I do not know what you mean on the swcong question

Step-by-step explanation:

A way of finding out how many orders a shape has of rotational symmetry is by getting some tracing paper and tracing the shape. You then put your pencil on the center of the shape and count how many time the shape overlaps

3 0

3 years ago

Add 20 to a number, square the sum and add the square of the number. The result is 848. The number is?

Katyanochek1 [597]

That a bit tricky question :-

so let's do the question in small steps :)

Let a number be x.

Part 1 :-

Add 20 to a number

here we have to take the sum of 20 and x so equation formed :-

20 + x

Part 2 :-

square the sum

So in this we have to square 20+x , so equation formed.

(20 + x)²

Part 3 :-

add the square of the number

So in this part we have to add (20 + x)² and x's square i.e x² , so equation formed :-

(20 + x)² + x²

Part 4 :-

The result is 848

So in this we the expression which came in previous part is equal to 848, so equation formed:-

(20 + x)² + x² = 848

Part 5:-

To find value of x

So simplify the whole equation and we will get x.

➻ (20 + x)² + x² = 848

➻(20² + x² + 2 × x × 20) + x² = 848

➻(400 + x² + 2 × x × 20) + x² = 848

➻(400 + x² + 40 × x ) + x² = 848

➻(400 + x² + 40x ) + x² = 848

➻400 + x² + 40x + x² = 848

➻400 + 40x + 2x² = 848

➻2(200 + 20x + x²) = 848

➻200 + 20x + x² = 848/2

➻200 + 20x + x² = 424

➻20x + x² = 424 - 200

➻20x + x² = 224

➻x² + 20x - 224 = 0

➻x² +28x - 8x - 224 = 0

➻x( x + 28) - 8 (x + 28)

➻(x - 8)(x + 28)

Two solutions:-

x = 8

x = -28

4 0

2 years ago

For Amy's cell phone plan, she pays $30 per month and $0.05 per text message. She wants to keep her bill under $60 per month. Wh

S_A_V [24]

Answer:

.05x + 30 < 60

Step-by-step explanation:

.05x + 30 < 60

.05 is the cost per text. Since we don't know how many text messages she sends, we have to use x to represent it. We know she pays $30 every month no matter what so, we can write .05x + 30. < means it has to be LESS than $60 NOT EQUAL TO, but less than.

I hope this helps you out!

3 0

3 years ago

Find the missing side. Round to the nearest tenth. Х у 39 57 y = [?]

frez [133]

Y = 46.2. View the picture to see steps