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Dima020 [189]
3 years ago
15

What is the smallest degree of rotation that will map a regular 18 gon on to itself

Mathematics
1 answer:
natali 33 [55]3 years ago
5 0

Answer:

  20°

Step-by-step explanation:

Rotating the figure through an angle equal to the central angle of one "sector" will do the required mapping. That is 360°/18 = 20°.

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Marta’s fruit stand sold many oranges on Thursday and twice as many on Friday. All together, on both days, she sold 108. Which e
lianna [129]

Answer:

<u>The equations that represent correctly the problem are A. 108 - 2x = x and D. x + 2x = 108</u>

Step-by-step explanation:

Oranges sold on Thursday = x

Oranges sold on Friday = 2x

Oranges sold on Thursday and Friday = 108

Formula for calculating the value of x :

x + 2x = 108

<u>The correct answer to this question could be alternative D. x + 2x = 108, but if we take a closer look, we'll find that there are other valid options.</u>

A. 108 - 2x = x

- 2x - x = - 108 (changing the positions and putting the variables on one side and the whole number on the other)

<u>x + 2x = 108 (multiplying by - 1 at both sides and it's also correct)</u>

B. 2x - x = 108 (This is incorrect because the sales of Thursday plus the sales of Friday equal to 108, not minus)

C. x + 108 = 2x

x - 2x = - 108  (This is also incorrect because the sales of Thursday plus the sales of Friday equal to 108, not minus)

<u>Now, let's find the solution</u>

x + 2x = 108

3x = 108

X = 36 (Oranges sold on Thursday)

2x = 72 (Oranges sold on Friday)

<u>After doing all this explanations, we found that equations A and D represent the problem. </u>

4 0
4 years ago
Read 2 more answers
Luis plans to purchase some new baseball bats and gloves before spring training begins. Luis wants to buy the same bats and glov
hram777 [196]

Answer:

Luis will pay for three gloves and four bats = $ 270

Step-by-step explanation:

Let the bats be represented by b and gloves by g, then according to the given conditions

3b+ g= $135----equation 1

b+ 2g= $135------equation 2

Subtracting equation 2 from eq. 1 gives

3b+ g= $135----equation 1

<u>-b -2g= -$135------equation 2</u>

<u>2b -g = 0 --------- equation3</u>

2b-g= 0

or 2b= g------ equation4

This means price of 2 bats is equal to price of 1 glove.

Putting value of g in eq. 1 from eq. 4

3b+ 2b= $ 135

5b= $135

b= 135/5= 27

Price of 1 bat = $ 27 and price of 1 glove= 2*27= $54

Luis will pay for three gloves and four bats

= 54*3 + 4*27

= 162+ 108

= $ 270

8 0
2 years ago
When solving negative one over five (x − 25) = 7, what is the correct sequence of operations?
Stels [109]

Answer:

Multiply each side by −5, add 25 to each side

Step-by-step explanation:

-1/5(x-25) = 7

Multiply each side by -5/1 to clear the fraction

-5/1* -1/5(x-25) = 7*-5/1

x-25 = -35

Then add 25 to each side

x-25+25 = -35+25

x = -10

3 0
3 years ago
Which of the following is a valid probability distribution? A 2-column table labeled Probability Distribution A has 4 rows. The
Ksenya-84 [330]

Answer:

i think its D on edg

Step-by-step explanation:

8 0
4 years ago
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I NEED HELP ASAPPPP
Y_Kistochka [10]

Answer:

69

Step-by-step explanation:

you add the nubers then subtract th 7

4 0
3 years ago
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