MATHEMATICS MIDDLE SCHOOL

Which rotation about its center will carry a regular decagon onto itself?A. 54
B. 162
C. 198
D. 252
Please explain!!!

Answers

Answer 1
Answer:

Answer:

D.252

Step-by-step explanation:

In this question, We have to find which rotation about its center will carry a regular decagon onto itself?

A decagon : 10 sided polygon

As we know, a full rotation can be 360°.

For a decagon: 360/10 =36

For a decagon, any multiple of 36 can map onto itself.

In our options only 252 is the multiple of 36.

So, correct answer is option D252

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Answers

Maybe is an equation, they are like "2x-5=34" 

If it so, then the way to resolve it would be adding the five (if the symbol is a minus) in both sides ( under the five and under the 34, then eliminate the "-5" and is going to be "2x=38") Then divide 2 in both sides (2/2 and 38/2) and is going to be (x=19) 

BUT if it's not the type of question you are referring about then idk how to help you because i don't have any details (?)

A mystery number is greater than 10 and less than 60. The number has a reminder of 1 when divided by 6 and a reminder of 2 when divided by 5. what is the mystery number?

Answers

37. 37divide by 5 has remainder of 2 but when divide by 6 has remainder of 1

Kevin is going to purchase sod for his backyard. How many square feet will Kevin need?

Answers

multiply 10 times 25 witch is 250. Then multiply 10 times 20 witch is 200, and last add them 200+250=450 that is you answer!
He will need 450 square feet of sod

Help please me please

Answers

Answer:

x² + 2x - 48

Step-by-step explanation:

Given

(x - 6)(x + 8)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x + 8) - 6(x + 8) ← distribute both parenthesis

= x² + 8x - 6x - 48 ← collect like terms

= x² + 2x - 48

What is the cuberoot of the squareroot of 324?

Answers

\sqrt[3]{√(324)}=\sqrt[3]{√(18^2)}=\sqrt[3]{18}\approx2.6207\n\n\sqrt[3]{√(324)}=\sqrt[6]{324}
\sqrt[3]{√(324)}=\sqrt[3]{18}\approx 2.62

For the equation y= 6x2 - 9x + 22, choose the correct application of the quadratic formula.

Answers

Answer:

The  correct application of the quadratic formula is:

               x=(9\pm √((-9)^2-4(6)(22)))/(2(6))

Step-by-step explanation:

The quadratic equation is given by:

y=6x^2-9x+22

We know that the solution of the quadratic equation:

y=ax^2+bx+c

is given by:

y=(-b\pm √(b^2-4ac))/(2a)

Here we have:

a=6

b=-9

and

c=22

Hence, the quadratic formula is given by:

x=(-(-9)\pm √((-9)^2-4\cdot (6)\cdot (22)))/(2\cdot (6))

i.e.

x=(9\pm √((-9)^2-4(6)(22)))/(2(6))

it’s the last option
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